This is going to sound really cruel and I suppose may depend on your age but I write as someone caring full time for an elderly parent.
There are no circumstances in which I would voluntarily put myself into a marriage or long term relationship with someone who had had a stroke and was in a wheelchair unless a full recovery were likely. I'm not a total bastard because if I were married already, I'd treat it as in sickness/health and not leave but you aren't in that situation. You have options. I would not voluntarily choose to enter a caring situation for life under any circumstances.
Caring is really REALLY hard. Unless you are flushed with cash, managing alone is tough, miserable, not really very rewarding, causes huge friction from time to time between carer and patient, and is very isolating.
Bear in mind if you have had one stroke, you are at great, great risk of having another one.
If you are young and saw children in your future, that will be even harder as you could be effectively a single parent caring for an adult as well as children.
I think if I were you, probably I would want to have a sense of what it would be like to live with him and care for him before he moved here. If you haven't already, I would travel to where he is and plan to stay for an extended holiday to get a sense of whether you could cope if this were your future and with the risk it would get worse.
You really need to be careful about what you decide and please don't approach this from a romantic 'but I lurrrve him' point of view. You need to get real and if you decide to stay, at least do it after some hard thinking, with your eyes open and not blinded by romance. You get one life and there are billions and billions of men in the world. Committing to a life time of caring is a huge step. It maybe for you but it may not be.