It outlaws: Refusal to sell or rent a dwelling to any person because of race, color, religion, sex, familial status, or national origin.Discrimination based on race, color, religion, sex, familial status, or national origin in the terms, conditions or privileges of sale or rental of a dwelling.Advertising the sale or rental of a dwelling indicating preference, limitation, or discrimination based on race, color, religion, sex, handicap, familial status, or national origin.Coercing, threatening, intimidating, or interfering with a person's enjoyment or exercise of housing rights based on discriminatory reasons or retaliating against a person or organization that aids or encourages the exercise or enjoyment of fair housing rights.

Some other tenants would be part of the county system has handicap tenants ( rent is paid by the county ).

I was willing to take the tight deal because it was helping a handicapped friend of the family who couldn't possibly keep the house.

Read this snip from Fannie Mae's guidelines:Borrower TypesRequirements for Owner-OccupancyParents or legal guardian wanting to provide housing for their physically handicapped or developmentally disabled adult childIf the child is unable to work or does not have sufficient income to qualify for a mortgage on his or her own, the parent or legal guardian is considered the owner/occupant.Children wanting to provide housing for parentsIf the parent is unable to work or does not have sufficient income to qualify for a mortgage on his or her own, the child is considered the owner/occupant.That means you could do 3%-5% down, get the owner occupied interest rate, get the cheaper PMI, and it'll be PMI that drops off once you have 20% equity, without needing to refinance, with no fraud or sneakiness required. 

He certainly doesn't have the financial means to find another place and has disabilities which require him to have close parking and a handicapped accessible unit, therefore, limiting his options to find another place. 

I can recommend Daniel Winkler in Oakland, but I'm not sure if he goes all the way down to Fremont.3) That handicap accessible ramp is probably costing you some money.

Smokers.Some newspapers mistakenly believe that smokers are a protected “handicapped” class.

You have to treat them as god, and don't ever give the impression you're trying to do the minimum.I'm sure you will follow strict standards: sprinklers, handicap access, natural disaster or flood protection, stormwater management for impervious surface (might need substantial room for a settling pond).

You do not want to be the guy kicking them out of the house with the handicapped kid on to the street, nor do you want to be the guy losing $700 per month for the next 20 years on a place.Feel free to call me or PM me if you just want to chat. 

Nobody agreed.The main challenge I found was that since you have to deal with an agent on the other side and can't talk directly to the seller, it severely handicaps your negotiating skills.