Possible disabilty problems

Not really sure what you're trying to ask here. Are you wanting to know if she can continue her treatments here? Surely, the French health care system is excellent. However, you have to be careful and make sure you provide your own insurance. It works a bit different for the British than for me (American married to a French national), so if I were you, that's what I'd look into.

Not sure if your wife's disability affects her mobility, but if it does, I would be very careful. It can be difficult to find accommodations that are wheelchair-friendly, for example. There was some legislature requiring French buildings to get up to code for easier access by all, but they've decided to give companies yet another 10 years to get up to code. I'm not handicapped, but as an American I still find it a bit shocking as to how little consideration is given for those with disabilities here.