There's way lower hanging fruit out there.

I am a lazy landlord (though a hard-working machine in general ;) ) because I have another full-time job already and several side items going all the time.

If a hot tub time machine brought me back to that age, knowing what I know now, what I would do would be:1)  In the very beginning I'd get the absolute cheapest housing possible, be it studio apartment, mobile home in a park, a bedroom somebody is renting out, whatever, and not worry if that makes friends and family laugh and worry about your life. 

We are simply looking for a solid cashflow machine.

The Florida Panhandle is a STR machine!

Your particular DM "effort" had not been presented previously,  but it's easy to see why it did not work out as others have pointed out.I'm sorry you way overpaid for your list, but most can tell you just one and done isn't going to produce much...what we're talking about is not much like a vending machine; more like farming.

However, most need to use really hazardous chemicals while wearing a respirator and using a machine to ventilate the fumes out of the building.

This idea is like a Rube Goldberg machine built out of broken Ritz crackers and pick-up stix.

Will apps like Deal Machine do that with the privacy laws here in California?

Here's why:Let's say I sign a tenant to a one-year lease, and 3 months in, their personal/professional situation changes, and they break their lease and move out after a 30-day notice (or maybe less).I am required, by law in most areas, to "mitigate my loss" by remarketing the unit, making it rent-ready, and starting up my lead generation machine to get applicants, funnel them into my screening system, identifying good candidates and ultimately leasing them up.