I know DSCR lenders typically don't touch them.

It needs to be replaced with a typical bedroom doorknob/lock so a locksmith would not be needed in the future. 

FHA loans typically require the property to be a primary residence for at least one year, so he should confirm compliance with his lender.Once rented, he can deduct expenses like mortgage interest, property taxes, maintenance, and depreciation starting from the date it's available for rent.

Private Money Lenders are going to be hard for a primary residence as it is an investment and typically they want to see a return prior to two years - also, the house would need to be purchased at a discount which would limit your options on a primary residence - now if you are looking for something that needs some work that you are planning on fixing up, it would be a little more feasible.

For the multi-family, lenders typically count about 75% of projected rental income toward your debt-to-income ratio, which should help if the property is cash-flowing.

Exit strategies are typically, refinance into a long term loan and hold or sell it for profit.Cheers!

But if you're able to figure it out and get it built, you can rent out the units and essentially BRRRR it and pull some/all of your equity out to repay your debts, yourself, and potentially keep the investment cycle going. 

typically anyone who says the following are not actual buyers:1.

The typical term of this loan is 12 months and rates range from 10%-12%.

- A 0% down, seller financed deal, typically equates to little to negative cashflow!