If I were in a desperate state, I would gladly choose any method that might work. Obviously, if the stem-cell treatment is going to put you into debt , then give it up. If it just puts a little dent in your wallet, then by all means go ahead with it.
The fat is where the toxins from cooked foods are often collected in the body, so it is perhaps not the most ideal location to get stem-cells from.
Bear in mind a few caveats:- it usually takes c.2 or 3 years to fully get rid of all the symptoms of very serious illnesses/diseases on a RVAF /raw,palaeolithic diet. I seriously doubt miracles happen overnight. Well, a very few individuals do experience such. My own experience was that c.80 % of my past illnesses/symptoms vanished over a 4 month period with the rest taking longer to disappear. Of course, if your current MS symptoms are only very minor, then that would be different...
Anyway, the main key point about such auto-immune disorders is that they are caused by inflammation. Switching to a raw diet avoids a huge amount of inflammation caused by advanced glycation end products. However one must take care even on a RVAF/raw, palaeolithic diet. After all, milk is implicated in multiple sclerosis, so raw milk consumption is a big no-no. Grainfed meat, however raw, is extremely unhealthy and contains a vast amount of heat-created toxins, such as advanced glycation end products, such as found in cooked counterparts. So go for high quality even when going raw.