Do I get to be part of the process, in terms of vetting out potential tenants ?

This also leads owners to ASSUME simpler is better when it comes to management contracts.

I have a property that I have rehabbed that is in a D level area that I would want to off load after a time anyways and was wanting to know how everyone goes about doing this.Do you have a contract that says something like "you rent from me for 3 years and then pay 100k over remaining balance of my mortgage"?

my scenario was a little different I would buy 20 to 80 acre parcels in Oregon and WA.. then log them .. using the skids roads and log landings strategically ( put them were future driveways and house pads would go). then do short plats  4 lots or less.. then sell the lots on contract.. the logs generally paid for the land so we had no debt on the land .. most land buyers took a few years to get to the point they were ready for construction loans..

I think you may be mixing up some terms. 

I am looking to buy a single family long-term rental in the San Antonio, TX area.

It's not likely to all of the sudden get better after you enter into a binding legal contract and they move in to your property. 

The capital cost short and long sucks though, no argument there!

I just want to make sure the house will remain standing for the long term.  

I was under contract but all my local lenders would not or could not loan on a manufactured home.