The payments coming in from the installment sales contract cover the payments on the monetization loan.

@Ron Fletcher I use Cozy.co for accepting rental applications and screening potential tenants.  

You should have your own pre-screening system before you charge them.

My hope on this specific condex was that I could rent the first unit (questionable if it is "liveable" though it is owner occupied now - he's in preforeclosure) to cover the mortgage, while fixing the back unit.

Never use the safety deposit to cover repair costs when the tenant is still in the unit. 

@Matt Horwitz That is an awesome screening strategy, I will give it a try. 

My sister and her husband will be moving to Austin for his job next year, and thanks to my constant chatter about BiggerPockets and real estate investing, they're interested in house hacking by buying a small multi-family and renting out the other unit(s) to cover their living expenses.They aren't on BP, so I'd like to help connect them with a few competent, investor-friendly real estate agents in Austin who have some multi-family experience.

They owe the bank 450k and HOA of $10k which we will cover.

My lender knows I have more than enough in savings right now to cover 25% down and a year's worth of payments on the loan, so they pre-approved me just a couple weeks after I had just closed on my first primary residence. 

Since I have 'a report' that contains the three reported credit scores (the document is from a lender who pulled my credit and not the credit bureaus themselves) from an initial pre-qualification screening, I'm assuming that I can just use these when approaching other lenders for their own reference in getting pre-qualified?