Thanks for that, but again, most of the available information, and even cases, associates the language of ADA and FHA or discusses the differences between ADA and FHA.

The only thing that makes a medical building different than any other building is the following:1) ADA rules - make sure your building is ADA compliant.

ADA doesn't specifically apply to residential real estate, but this could help you out.  

Posting in Craigslist can certainly be profitable - especiallyif you are in an area that is free to post in.The Key is that you must be a great copywriter to compel usersto open your ad and continue reading, and respond.Then --systematize-- posting your ad as frequently as Craigslist allowsso it only take you less than 3 minutes get in, post, get out.

Consider calling the ADA hotline and ask your questions there.

You can also save money by looking for former restaurant spaces with ADA restrooms and kitchen with ansul system.

As a result, I paid approx $18,000 remodel, repairs, restrooms, electrical, lighting, and ADA compliant.

Just to add on the endless possibilities mentioned above, you can be a consultant on ADA regulations for senior living homes or specialty home to accommodate the disabled. 

You will need to make the entire property ADA compliant to get wheelchairs up stairs, to get wheelchairs through every doorway inside the house and you need bathrooms large enough so wheelchairs can get to the toilets and sinks..You need shower stalls large enough you can roll a wheelchair inside. 

Lease the property that needs no special requirements other than ADA type issues to a care provider such as your local mental health association affiliate or possibly a drug rehab or ambulatory clients.