Again, the BiggerPockets store has some books on this topic, or you can learn about it by watching podcasts, reading blogs, and interacting on the forum.

I generally advise my clients to skip properties that are near main street traffic or commercial buildings/stores.

I guess you havent been to the grocery store in the last couple years , filled up your gas tank , paid your insurance , or bought a car  ? 

@Chris Jordison Check out the bigger pockets book store.

If you want to brush up on PML, I suggest you check out my book Lend to Live: Earn Hassle-free, Passive Income in Real Estate with Private Money Lending available on the BiggerPockets book store.

Make a folder to store relevant documents per property.

For example, I can get up-to-date pictures of a property (with time stamp on it) for as low as 10$ in 24 hours, most of the time it is more expensive to grab your car and go there in person if you also count your time invested. there is a great book called "long-distance real estate investing" by David Green (you can find it in BP book store or on Amazon) which goes over a lot of those services and find solutions to long distancing investing.

The retail (corner store) unit was converted to residential over 20 years ago.

Location: Central CaliforniaI also have an online store that brings in 150-200k NET per year and that’s what we live on and use to build a savings.

@Mauricio Duarte I don't recommend using Expense screen to view all your expenses since that may not capture all transactions, ie. refund from store processed as deposit or journal entry.