She called my 5 days before telling me her husband had a stroke about a month before and they hoped they would be able to still use the house with their family but he was confined to a wheelchair and we are not ADA friendly which is a bummer.I refunded the full amount no problem.

That would include things like installing a wheelchair ramp, grab bars and hand rails, lowering counters to wheelchair height, assigning a parking space closer to the entrance, allowing therapy pets in an otherwise "no-pets" rental, etc.Good start here: http://massfairhousing.org/housing-discrimination/...And here: https://www.masshousing.com/portal/server.pt/docum...And here's what happens if you screw up: http://www.mass.gov/ago/news-and-updates/press-rel...

If they're in a wheelchair, they need a ramp.

I didn't matter that overall the unit was better suited to handle his disability (wheelchair); it didn't matter that the land lord was just being "kind" or "helpful" and wasn't trying to be a jerk. 

Assistance animals perform many disability-related functions, including but not limited to, guiding individuals who are blind or have low vision, alerting individuals who are deaf or hard of hearing to sounds, providing protection or rescue assistance, pulling a wheelchair, fetching items, alerting persons to impending seizures, or providing emotional support to persons with disabilities who have a disability-related need for such support.

Society has done a great job accommodating wheelchairs.  

depends on the demographics.If its a retirement neighborhood, lots of elderly people some may find it a tripping hazard or a pain for walkers, wheel chairs etc...Down here in south Florida many older folks would not buy two story homes because of having to trek up and down, and we have lots of older folks.Sometimes the elevation difference can be partially minimized visually by using creative threshold transition pieces.

Right after they moved HOA started the project to redo all hallways (it is Florida so all outside) and sidewalks with the new cement.  7pm last night they allowed people to leave units and my tenant went with his wife who is in wheelchair outside.

I have no idea what our holdings will look like by the time I'm confined to a wheel chair and tube feed??  

Bill S. made a very good point, follow it, there are "testers" some are very good, for example, they may say to a Realtor "I'm wheel chair bound, can you pick me up, I'd like to see this house" guess what, Realtor may need to go get an accessible van under ADA.