They give the tenants a choice of either buying from the machine or buying from a regular store while giving the landlord a little extra income.I also like the idea of a survey. 

@Sydney Cash I would recommend anything and everything by Robert Kiyosaki, Most of the BP books you can find in the Book store.

Relatively recession proof areas such as grocery stores or some tech startups.Btw..

This property is on corner of two busy roads and there is no shortage of stores, strip mall, etc going up all around.

I know these years of buying my t-shirts out of the nine-cent box at the thrift store (yes, this does exist) will one day have a positive ripple effect on everyone important to me.

I've submitted an LOI for an MHP a few hours away from where I live in a great city, with high incomes, housing values, and retail stores.  

Put leaflets at their YMCA or Grocery Store or their Libraries. 

The Bigger Pockets book store if full of great books: https://www.biggerpockets.com/store

@Eric Castelli, well you've heard how a furniture store doing a credit pull the last week of escrow can screw things up, right?

Almost all banks have their own "Merchant Account", that means that the bank themselves will loan or let you buy a virtual terminal or Point Of Sale device for actual swiping (like a card reader for smartphones but the bulky in-store devices), whichever the client prefers.