So I have decided to only make him leg paralyzed, so he cannot walk. But he can still use his arms, eat, drink and speak well, so it wouldn't inconvenience the players that much. For moving around, he would simply use an electric wheelchair that he can control using his fingers. I intend to make him a person who doesn't want outside help unless totally necessary, so even though he has nurses at home, he would usually go out by himself. For movements in places that doesn't really assist wheelchair use, I'd probably have an NPC, like a fellow colleague, or maybe ask a player to help. There maybe more subtle things that I may have not addressed, but I'm sure I'll be able to address it