Williams "strong" credit is a little open to interpretation but the recommendation here is to go speak with some lenders.  

I certainly can't imagine four adults living in that place, but I am unsure how to interpret some of that reference material -- would it be considered discrimination w.r.t. familial situation?

I would assume so, but it's best to check with the lender to see how they interpret official FHA guidelines which read:"Net Self-Sufficiency Rental Income is calculated by using the Appraiser’s estimate of fair market rent from all units, including the unit the Borrower chooses for occupancy, and subtracting the greater of the Appraiser’s estimate for vacancies and maintenance, or 25 percent of the fair market rent."

Quote from @Jon Haney: Hi, quick question about selling a rental property for less than it's worth and tax implications.I purchased a rental property on 9/1/2022 This is actually controversial.See, you already labeled it a "rental property" - but it is only one of 3 possible ways to interpret your situation:1.

It is somewhat town specific but I am having trouble interpreting fire code for automatic sprinklers on a large renovation.

That's why I don't like arguing contract law because there is room for interpretation. 

That gives a wide latitude for interpretation, especially for a buyer looking to get out of a deal. 

Do you have a full knowledge of the RTA and how the LTB both interprets and makes rulings based on it. 

Make sure you run your scenario by your lender, instead of just relying on your interpretation from HUD's web site.

Governing documents, and in your case, proprietary lease agreements can be vague and open for interpretation.