Kids kept me company & daughter cooked for me, etc., while we all lived in my house.

In person is when you drill for oil.

The big variables will be Immigration controls, the tech industry relating to California real estate, and oil/petrol for midwest states. 

If those units are located within the City of Chicago or Cook County hire a pro landlord attorney located in Chicago to review whatever lease you draft.

I am dealing with a Rental Commercial Property which is located next door by the Gas Station ( which is no longer in service but they have auto service business ongoing  ) My lenders required 21E Massachusetts Oil and Hazardous Material Release Prevention Act reports from the property.

I would only see that if I sell and right now the cash flow is worth keeping the machine well oiled and chugging right along. 

Frat boys will run amok, families will tear down your walls, old couples will "forget" to pay you for months on end and random people will paint your walls with oil paints in colors that children would find revolting.Screen people, take the max security deposit and make sure you are protected from damages in every way you and your lawyer can think of.

The #1 thing you need to look into is converting the Oil heat into gas.  

Otherwise, you'll have explaining to do.....I'm working the oil fields in AK for 6 months, I'm in Europe traveling, I'm having to stay with my sick Aunt in Cleveland and your story needs to check out.

Though I personally do not like Aldi and could never do all of my shopping there, I do buy things in bulk and do a lot of cooking and preparation at home.