That's a strong portfolio, but the cash flow gap is a common challenge.

That's really common, a lot of investment condos become non-warrantable because of that. 

After working with multiple city building departments, I’ve noticed most permit rejections come down to:

1.Missing code-compliant details in drawings

2.Outdated plan formats that don’t match submission guide...

Deal (noun): In common usage, a property offered for sale that meets the financial and strategic criteria defined within an investor’s buy box.Yes, all my clients, 'want to buy a good deal."

This can come from many different directions, but most commonly it is people that you have a personal relationship with and/or a referral from a close friend that I trust, especially when you are starting out, and even then it is still hard because you need to not just have these friends, but they also have to have some liquidity to invest.And to address your other question about track record in SFR vs MF, to some extent you are correct on the assessing deals. 

It's commonly known as double closing.2. 

Hard money is a very common route to go.

We have opened walls and found wiring down with lamp cord, wiring that was simply twisted with no box or wire nuts or tape inside walls, joists that were cut almost all the way through by plumbers running piping (fairly common even today), wiring with nails through it along with burn marks (ever wonder why old homes catch fire?)

Quote from @Leo Leiva: We've been in the business for over 15 years now, and the most common reason for a deal falling apart is a borrower omitting critical information — or, in some cases, trying to pass off borderline fraud as fact.not only borrowers but intermediaries (brokers) as well.  

Structuring under an LLC is common, too.