It is investment banking, so the rules are much different than your "normal" lenders who offer mortgages or loans to cover a single or portfolio of collateral. 

I have some great examples in my book, including my father-in-law who lost tens of thousands from a single mother that he tried to help.Stay at market rates.

Don't trust what ANYONE tells you about a market without solid data to back it up - this includes claims about how many transactions they've done or a single example (that's often from several years ago). 

I own one multifamily property (6 units) and a few duplexes and single family homes. 

Was it a new double wide or a 20 year old single?

What we really need is a single internet "bad tenant" list to warn each other.

Duplexes are generally valued lower than a single family.

., "I will buy at least one single-family home, duplex, triplex, or fourplex before the end of 2019") and then do it.

This tenant is single with no kids.

Thus, I think that we could see national rents rising in the high single digits, or possibly surging as much as 10% in 2026 vs 2025, with some markets seeing rents rise even faster than that - Austin, TX regaining much of the lost growth in 2024 and 2025, for example.