Does the government provide financial assistance to rehabbers who want to make homes wheelchair accessible or to the disabled in general?

Here's one from years ago.A husband and wife moved into my house in Phoenix.The husband was in a wheelchair.

You have to treat them like you would a wheelchair, period, and it is considered a "service animal" not a pet.Your Property Manager is correct that the HOA cannot charge for anything. 

Purchase price: $100,000 Cash invested: $32,000 Sale price: $175,500This started out as my primary residence - I originally put down $17,000, the extra cash invested was primarily making modifications for wheelchair access.

Now, however, if all you added was a ramp for him to be able to use his wheelchair - that hardly is an improvement that is going to increase the property value or tax bill. 

(despite the wheelchair issue)

@Chris Sweeney seems like you would be required to put on handicapped access if you made it a commercial space including a bathroom, larger doors and a way for a wheel chair to get up the stairs.

It's available to owner occupied properties as follows:Disabled Veterans' Standard Homestead Exemption For veterans with a disability between 30 - 50 percent the exemption is $2,500; for veterans with a 50 - 70 percent disability the exemption is $5,000; veterans with a service-connected disability of at least 70% are exempt from property taxes on their primary residence.I would focus also on things like wheelchair accessible features if you go down this route.

And even the most minor repairs can not be done by the tenant because he is in a wheelchair.

I will plan to do just 1 type from bathroom to kitchen and all other rooms (in preparation for my mom's future wheelchair usages).