Once you have a seller that has agreed to provide owner financing, then, as other commenters have stated, it's pretty much just a promissory note (which governs terms of the loan and creates obligation to repay) and mortgage (which secures the loan against the property).  

If the tenants don't get subsidies, why is it a government funded program? 

Are you checking government issued photo ID to protect yourself against ID theft? 

Just 39 were accepting tenants with so-called Section 8 housing vouchers, the subsidized rental assistance from the federal government.Kristine Bergstrom-Norwood with Nevada Legal Services said she and her colleagues see this problem all the time.

Hello Jeff MHA stands for Memphis Housing Authority (Section 8 government-subsidized rent).

It's a government insured mortgage.

We own and manage around 200 units in Yonkers, we're very familiar with Section 8 and other government assistance programs.   

Navy Federal Credit Union will do a HELOC up to 70% LTV on investment property. 

Remember there are multiple levels of government oversight so local laws/ordinances my be trumped by state or federal laws as well. 

Learn the laws that govern landlord-tenant relations in your area well.