Ratman....if you don't mind me asking, if you are wheelchair bound, what size door openings do you have in the house and what width are your hallways?
The reason I ask is that my wife and I were discussing this very same thing last evening and I mentioned that all houses being built should be handicap accessible just for the fact that someone in a wheelchair is limited on houses to buy unless they are custom built.
Personally I would like to see all new houses built with 4' doorways and at least a 4' hallway.