I'm in the SF (South Bay) area. My experience has been that places that sell "game meat" are selling farm-raised animals. I can't cite the exact law, but there is one that says that a retail meat establishment cannot sell animals that have been bagged by a hunter.

So, find a hunter! That might be easier said than done... all the hunter-husbands of my friends make jerky or sausage before I can blink an eye, even when I ask in advance. If you go up north a-ways and know people, you can find more of what you are looking for. I used to do this when I lived in Lake County where I could get road-kill deer in pristine areas from old-timer neighbors who all knew the rangers. Don't try this on your own or they WILL arrest you, handcuffs and all.

I have better luck finding fish caught off the coast, but there are issues with Fukushima and local fish, plus there are bans on some seafood, even mussels, because the waters have been too warm.

I have similar skin problems, although not nearly as bad.  Vitamin D supplements, specifically the Now brand, really help me.  Sunbathing also helps a little as well.

You might want to get him seaweed to put into foods instead of just salt or "seasalt".   Try kelp and dulse.  Seaweeds naturally have a high potassium level as well as other trace minerals, much better ratios for seasalts.  Low potassium and high sodium causes the body to retain fluids, the body will not get rid of fluids properly if there are mineral imbalances.  Seaweed is also a natural source of iodine, which should help the skin to heal of any infections.

I also forgot to mention you might want to try adding "great lakes" brand gelatin to your diet if you are not making slow/low cooked broths or consuming much connective tissues.  This will do a great deal in healing up the skin and giving it the proper amino acids to rebuild.

Jarrow brand makes an excellent Glucosamine Chondroitin and MSM supplement that might be more beneficial.  MSM is excellent for skin repair, as are any forms of sulfur you can get into the body...they are also excellent for healing and to cleanse the blood and liver.  This particular supplement is also high in potassium, so it might be extremely useful right now to help the swelling as well.    You also might not want to be taking a supplement that has marshmallow (or other herbs) as it will inhibit some of the absorption of minerals and vitamins, as it coats the intestines to soothe them.   Because your BF is so sensitive, I would suggest testing out all of those herbs on their own to be sure they do not cause some sort of reaction, or just skipping them all together.

Oysters sound like a great idea as they are high in zinc, which is another mineral that is great for healing.  The zinc also might help with his night sweats, those might be attributed to hormonal imbalance.  Having this condition probably buts a lot of stress on the body and is taxing the adrenals.  They only have two pathways, to make sex hormones, or to make cortisol, my guess is that they are leaning more towards cortisol production and this time and his endocrine system is becoming out of balance.

Same with Vitamin C, these are two very important things to think about supplementing while under stress.   If you want any suggestion for vitamin c supplements I would be happy to give those too.  Magnesium like goodsamaratin mentioned is also great because that is probably being lost during night sweats, any extra vitamins and minerals you can get into him, from excellent sources of course, will probably do a great deal to help.

The reason I mention colostrum is not only is it a great immune supporter, but it is high in lysine and luecine, which are amino acids that are in high concentrations in milk and that are helpful for healing skin issues and repairing damage.  Also the fatty profile in well raised and fed raw dairy seems exceptional for adding moisture to the skin, perhaps you have a source of raw dairy and can try making butter??

I would suggest to try the oils you are using as food on his skin  and see how he reacts. You already mentioned coconut oil causing a rash on the skin, is that not reason enough to not take it internally?  I would still caution away from them even as flavors as they can be harsh on the liver.  Especially in someone who's health seems so sensitive and who needs to be eliminating anything that might be the least bit inflammatory......I would recommend to stay away.  Also, I used to use olive oil on my skin even though it seems awfully thick and somewhat ineffective , but I used it because it was less expensive then my preferred oil, which is JoJoba oil .  I am super sensitive and cant do other seed or nut oils, but jojoba seems to be the best oil, you might want to look into that if olive oil ever causes issues.  I have read that is it the most closely similar to our skins own that you can find.

SULFUR: A MODERN DEFICIENCY, A SIMPLE SOLUTION
Of the six main building blocks that power life on this planet - carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur .... "

His feet are likely swollen because he is eating lower carb but it doesn't seem like you are supplying extra salts, especially potassium.  I would recommend brewing up some dandelion root tea and adding some lemon to it, and drinking that down with a ton of water.  Both salt and water intake need to be much higher when you are more fat and protein and less carbs.  Adding seaweed such as dulse and kelp to the diet to keep minerals balanced.  Eating mineral and water rich vegetables also helps, celery and cucumber for example.

What oils are still being taken internally?  If you notice reactions on the skin from oils, just think the internal reactions they might cause.  I would suggest to not eat any refined oils and instead switch to egg yolks.   It also might be good to source fatty fish and buy in bulk, or look for pastured pork fat, anything to get omega 3's and vitamin D, which are very healing to the skin.  Other then that I would also suggest that you might invest in some raw colostrum to help boost his immune system.

Oh, I didn't really get into details about food. My mistake. He's a salt ADDICT. Sometimes, I find him just eating it straight from the shaker. He's always been a big salt eater. And, I do add salt to our food almost all of the time. Generally, as much as I can without ruining the food. Also forgot about eggs - we both eat about 3-4 egg yolks a day. The oils we eat are organic, cold-pressed olive, coconut, and sesame. Mainly just for a little flavor in some recipes (so we aren't consuming large amounts of any). Would they be that detrimental?

We're definitely doing our best to eat fatty meat. We scored some freshly cut sockeye salmon heads last week and ate everything we could out of them (they were amazing btw). It's been tough finding some stuff, though. Having to go out of our way to find stuff like that. Haven't found much pastured pork except for sausages, unfortunately.

Can you give me some more info about the colostrum? I've read about it, but I didn't know much about picking out a good one.