What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

I think the big thing is when you have family and friend influence of getting an engineering degree to change completely to a new role kind of gives you judgement all around.

Single Family or multi-family property? 

I'd love your insights on which cities you think are ideal for multi-family properties, especially in states with landlord-friendly regulations.

Or slow Do people actually rent single family homes for $4000 ?   

Most had mom and dad, and 2-3 kids and their families and grandkids living in the same house. 

Were you targeting a single family home or multi-unit property?

A Stanford study revealed that over 75% of the ADUs built in San Jose between 2016 and 2020 did not have a permit and are therefore illegal housing units.The lengthy permitting process, high construction costs, and shortage of tradespeople are some of the factors motivating property owners and contractors to take on the risk of building, renting to tenants, and/or housing family & friends in an illegal unit.

Quote from @Jordan Connett: Personally i'm in Denver and BRRRR is not a strategy I'm chasing right now due to the fact I cannot cashflow deals with rates and prices. we are still flipping, developing and buying larger apartment projects (sometimes BRRRR on those) but single unit BRRRR is not a strategy for us, here, right now. we are seldom doing Brrr s on single family units  duplexes and 4 plexes are what works.

Basically, if we bought the duplex, we couldn't qualify for another loan that would let us buy another duplex or even a single family home.