I managed three teams consisting of 3-4 employees each and led all their projects simultaneously, while overseeing accounting, marketing, and financial operations.

I own three units near Ohio State University that I have considered converting from LTR to MTR.

If there is so much money invested in DST's, can one reliably say that sufficient number of investors are profiting?

With say $20k in cash-out, and $65k held in escrow, you could recycle that $20k three times over by completing work, ordering a draw from your rehab loan, and receive those reimbursed funds for completed work in 3-5 business days.I walk through the whole BRRRR process with clients via purchase-rehab (or refi-rehab) loans, and then DSCR refinances once work is complete.

Use the top three or four discriminators so applicants can screen themselves.Then it would be best if you had clear screening criteria yourself.

The residential are large (2000+ sq ft) but only three bedroom.

I personally only lend to three people - they are the three people I generally asked advice of when I was an active investor and I completely trust them. 

Three months later, she moves in her "bad boy" boyfriend.

I have sold three fix and flip homes this year after only a short time on the market. 

The way to avoid this is to have sufficient reserves.