Many managers still request it however a service animal is identical to a wheel chair and law strictly prohibits the enforcement of verification.

I was wondering if anyone in the Atlanta area can give me a contact for getting a house retrofitted for a wheelchair?  

However he is now in his late 70's and on oxygen, in a wheel chair, unable to leave his house without an aid. 

You can't deny them because of their disability and you should try to accommodate any "reasonable" requests for modification (grab bars, wheelchair ramp, etc.)As Claudio pointed out, there may be funds available to help you set the home up to make it safer.

If we have a tenant in a wheelchair we need to let them put in a ramp but they are responsible for cost to install and remove, I don't see this as anything different.  

We recently purchased and moved into a house that is set up for someone in a wheelchair.

I then explain that just like someone in, say, a wheelchair asks for an accommodation, maybe a ramp to get into the house, I can allow that. 

If you explain about the possibility of two guys with steel pipes jumping out of the bushes the year after next and putting him in a wheelchair with a brain injury and a colostomy bag to crap in for the rest of his short life, he might still not get it.

Regardless of how we feel about this loophole, behavior that could be considered discriminatory against this tenant is legally on the same level of having a "white only" or "no wheelchair access" in your advertisements. 

Our contingency on our offer was to evict the first-floor tenants to owner-occupy the first floor, as I use a wheelchair.