Beautiful thing about RE is there is plenty of people out there and you can find the right fir for what you need as the seller

You could then again qualify for the Section 121 Exclusion, which allows you to exclude up to $250,000 ($500,000 for married couples) in capital gains from taxes.I think that people can get rich in this way without any tax burden.

Is this how most people do it? 

I find single ADUs are mostly being added by people with minimal RE investment experience often without a clue as to the value that will be added by the adu addition.  

It sounds like you might be in the situation I'm in: buying a vacation home that I plan to use as a STR when I'm not using it so that other people can help pay my mortgage.

Go to local meetups, search these forums for people that have mentioned that they do private lending and attend other RE events.

Most people looking to hire on there are looking for cheap bookkeeping.

I’ve been coaching new investors for a while, and I always enjoy hearing about what brings people to real estate.

Like most people have noted, Costco and Amazon are the best places to go.

I tell people this is the worst time to do a subdivision.