Living in one unit while renting out the others is a smart move.

Quote from @Brian Koons: Constructing an Accessory Dwelling Unit (ADU) in Southern California is a smart move, especially in a highly desirable neighborhood.

It’s always smart to do your homework and make sure the provider’s model aligns with what you’re looking for.As for fees, management companies typically charge 8-10% of the monthly rent.

Why would a smart investor do that? 

Calling the appraiser to see what you can do to push it up a "C-Level" would be smart before doing any reno also, might only need a few things to make it far more valuable in the eyes of the bank.I've heard of a tactic for figuring out demand, which is to put up a dummy or coming soon listing on facebook marketplace and see the amount of activity you get on it. 

A smart kid would say  NYET.

Building Credit with Vendor AccountsStarting with Net-30 Accounts (vendors that give you 30 days to pay invoices) is a smart strategy.

Buyers are Liars" You'd think most buyers would be smart enough to stop lying when their lies have been publicly disproven.

I don't think it is smart to start off buying foreclosures in an area that goes for 500-600k. 

Starting with a small multi-family house hack is a smart move, offering the benefits of living rent-free and equity building.