We can usually do the whole routine of 'move out, move in' in under a week while working our normal jobs for under $1k.The closest idea that I can find is this: https://passiveincomemd.com/buy-one-property-a-year-and-retire-early/(main distinction being that we live in these houses and pay a lower DP)The specific questions that arise in my mind are as follows:Why don't other people do this? 

Specifically I am trying to match my Marine Corps salary of 2k with passive income by June 2020 ( when i get out).

On top of that if all of your mobiles were goneand you were to get an appraisal to finance on the property it wouldn’t match or exceed the current seller asking price and at this point you would have yourself a resedential home that is not cash flowing which then turns this deal into an expense.

Determine what your plan is for this investment and get the leases to match the plan.

Solar installations are designed to match a buildings usage as closely as possible so that the surplus energy produced during the day offsets the energy consumed during times when the sun is not shining.

I haven't had any sound-transmission problems in the duplex, as you might imagine.But way back when I was a student, I distinctly remember living in a cheap basement apartment with nothing covering the exposed joists overhead being forced to listen to all sorts of activity upstairs.

If you use the "Combo listing" strategy, you can see huge returns by dynamically pricing the units correctly to match demand.

I left my stable, good paying, 401(k) matching, pension contributing job to pursue real estate investing full time.

A landlord or property manager will be able to tell you who owns the property... does this match with what you know from the land record?

A family member is willing to invest $300K with me, but only so long as I match his investment.