The only program that is remotely similar is one from Performance Equity Partners (PEP).Some of the manufacturers also offer home financing programs (although it applies to only homes they manufacture whereas 21st and PEP does not) and that includes the Revive program from CAVCO and another from Legacy Homes in Texas.

Metro Detroit has a great balance Price/Rent/Location.I have all my rentals here and will keep buying because they perform very well.The “trick” to Metro Detroit is the ring city suburbs.

Every state has different laws but in my state typically the Buyer can sue Seller for "specific performance", or seek damages, or let it go (obgligatory "I'm not an attorney" statement - really...I'm no attorney).

Originally I was looking to purchase a SFR that I could put some sweat equity into and rent out at some future point but lately have been contemplating a duplex in order to house hack.I have been combing through the forums and information on BP but would love any advice or suggestions for additional research I should perform. 

If wholesalers are presenting you with offers that they have not performed " due diligence" on.

I have zero retirement savings and am eager to start building a passive-income portfolio so I am not a burden to my child.One of my biggest hurdles is that I need to boost my income so that in the bank's eyes I can afford the mortgage payment BEFORE collecting any rent.

There is a reason that A-class properties have a small COC rate, because they give SECURITY, reliability, performance, and equitable gains.

As a LP, they made good on their pro-forma that you originally signed up for and probably out-performed that.  

Seems like there are several companies that perform this service, and would be interested in recommendations. 

Don't pay the first and the first will foreclose on you.I have bought a non-performing 2nd.