It also depends on the subject property. 

that isn’t subject to higher down payment requirements or higher interest.

Overall I love the R2 zoning route, but the permitting & construction costs alone will be tough with the budget you outlined in your post. 

., as Chris noted, the required documentation will be outlined in the LP Agreement you signed.

Risks: rates go down and you have to pay a prepay of 2 or 3 %; you have to sell and pay the prepay; rents decline & you can't make the payment like any other type of loan; cost upfront a little more than conventional; need to find experienced broker licensed in the state where subject property sits; servicers are bulldogs. 

I'm a newbie tooSelf education through books is a conversation between the author (mentor) and you.You'll gain knowledge, connections etc but it takes timeAttending meetups, listening to Youtube videos on subject matter further broadens knowledge base

Hard to produce cash flow or break even with that much debt, at that rate.House-hackers, however enjoy certain one time (non-scalable) advantages that should be taken advantage of in the early days: - They can assume pre-existing debt like VA and FHA Loans (rather than take it on Subject-To which is dramatically riskier).- They can rent by the room and self-manage to produce day 1 cash flow.- Many of these HCOL areas also have strict limitations on AirBnB or short-term rentals... that do not apply to owner-occupants - thus allowing for extreme cashflow potential for house-hackers.

It would not surprise me if they were acquiring the paper and servicing rights to take an inside line on refi's for these customers if rates decline.Actually CFPB regs may NOT apply if the subject loans are investment or commercial property loans and not SFR owner occupied or consumer loans. 

When people bring up Subject To (very risky) and private money it's usually because they have seen a lot of scaling content.

I recommend outlining your financial goals and definitely exploring work transfers to determine what suits you best.