So 2 disabled seniors.  

there are Fair Housing categories/protected classes you need to steer clear of, such as familial status, disability, race, religion etc.  

Where i live a section 8 tenant can be a single mom, or disabled individual most of the time.

All modifications are at the expense of the disabled person, and the disabled person must agree to restore the premises, at their own expense to the pre-modified condition (provided the modification would affect the use and enjoyment of the premises for future residents).We require:Written proposals detailing the extent of the work to be done.Written assurances that the work is to be performed in a professional manner by a licensed/bonded contractor.Written approval from the landlord before modifications is made.Appropriate building permits and required licenses made available for the landlord's inspection.A restoration deposit may be required per Fair Housing guidelines.Start of Lease Agreement:No rental property will be held vacant for more than two (2) weeks, unless approved by Liberty Management, Inc.Residents moving in before the 20th of the month pay prorated rent for that month, for residents moving in on the 20th or after they will need to pay the prorated rent and next month’s rent at move-in.Vacant Homes --- Liberty Management has a policy that all leases will begin within 14 days of application approval or Availability date whichever is later.

A service animal does not count as a pet because it is higly trained and is required by the person with a disability.  

She will have to show that she has a disability under the American's With Disabilities Act, and that a dog will help with her disability. 

I'm a low income senior on disability now, and I live in subsidized senior housing.  

Well, I'm now disabled and low income.  

I had a conversation with one today who knew less than I did on a disability issue.I agree to start eviction proceedings.  

I want to make sure you thoroughly understand this piece since you are going it alone.The Fair Housing Act prohibits discrimination against prospective tenants and current tenants on the basis of the following characteristics or "protected classes": race, color, religion, sex, national origin, disability, and familial status.