Newer properties with wheelchair access? 

For example, "walking distance" could be seen as discrimination against someone in a wheelchair, so you should say "four blocks to Mentock Park."

The owner is elderly, in a wheelchair and doesn’t want to be a landlord anymore.

Even though she got 60 days notice, she still couldn’t find an apartment in the area that was first floor and wheelchair accessible.

The woman was in her early 90s and had dementia, but for some reason the relatives brought her to the closing in her wheelchair.

Just as a single mother who is a police officer or a wheel chair bound veteran.

For example: no carpet anywhere (fall risk), wider doors (to accommodate wheelchairs or walkers), walk in showers...etc.) 

The neighbor lady had her foot amputated and is in a wheelchair but seems to become friends with nearly every guest. 

@Lucas HallenbeckI used a 203k in 2009 to remodel our house for wheelchair access.  

If some requested aspect is detrimental to general market demands the entire cost should be paid and, in addition, an amount necessary to bring that aspect back to market demands.For example, kitchen cabinets made to ADHA standards for a wheel chair won't be generally marketable.