I also run a large community of bookkeepers who serve the REI industry. 

I personally never explored them much.

A true DSCR product doesn’t care about your personal debt. 

Is this a deal that really just needs a large down payment to make sense? 

The only PITIA paid from personal account is for a personal residence.

If you have done this before, would you mind checking my math and seeing if I'm missing any large aspects? 

They're all going to use NOI/PITI, but you'll experience a range of DSCR requirements which will directly affect your max LTV and you'll also experience a range of rates.

The property cannot be valued in the traditional way, which is why I'm seeking a private lender who will value the property in a commercial-style method via the cap rate.Source of down payment funds: Implied equity (refi)Income Source: W2 for both my wife and IGross annual income (between the 2 of us): ~$300kMonthly debt obligations appearing on credit report, plus (if applicable) personal rent and alimony/child support/etc: Student loans, rent, and what exists for this tiny house.FICO: 725Credit issues: noneThanks for reading this far!

To me that is how the average person in the USA can get pretty wealthy. 

Annwar - There is a large real estate investing group called "DIG" in the Northern suburbs of Philadelphia....