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.

Like a wheelchair.

1. you can't discriminate against a legit service animal any more than you can a wheelchair or crutches.

You have to treat the dog as if it were a wheelchair, it's no longer a dog.

The previous owner was in a wheelchair so ALL of the interior door frames have been modified to accommodate 36” doors.

A tenant with wheelchair disability filed complaint with South Carolina Human Affairs Commission against our multi-familty property (apartments) in Columbia for not building a ramp per her request.

Electric wheel chairs and segways for everyone. 1960s also here we come.

A tenant had lived in the building for several years a 1st floor unit,, she had bad accident.. she loved living there, the family hired a contractor to put in everything she needed to assist in her daily living,, including a cement ramp to enter and exit the building... she was disabled, wheelchair bound, yet able to transfer and mentally able to act on her own behalf, and was also able to have a dog, due to companion needs.. 

Have you considered maybe a one year lease at a nice apartment in a big complex near your home (walking distance).You can help her on days when she doesn't feel well, and she can come over and help you on other days.Here are some 1br, wheelchair accessible units with pool hot tub, dog/cat friendly, gated with onsite parking and air conditioning, as well as a workout room (if the Doc's tell her to do that). https://www.apartments.com/apartments/los-angeles-ca/1-bedrooms-pet-friendly/air-conditioning-washer-dryer-dishwasher-parking-fitness-center-wheelchair-accessible-pool-gated/?