Somehow that stuff neutralizes the glue so you end up cutting a square out along the existing lines and re- laying a new section.

At the very worst, the 2 existing homes should be neutral, until you refi them.

Our 2 investment properties are cash flow neutral AND on a 15 year note which no longer seems possible in todays market (they were bought in 2011 and 2013).

As long as it's a cash flow-neutral setup, you won't even have to feel guilty about renting to your mom.

He acted like neutral third-party helping us navigate the paperwork, we did not have the impression that he was doing any heavy lifting for us.

First, I wouldn't suggest an appreciation play in Texas, unless you can get at least cash flow neutral.  

My neutral advice is to go slow and take your time and learn what folks offer then decide what is the best path for you.

Having a truly neutral person look at the property is a must. 

They are almost always all bark and no bite...especially if you stay professional, neutral, calm, and friendly/polite.Keeping one good tenant while costing you multiple good tenants is obviously not worth the trouble or lost money.

The house is well done with laminate wood flooring, large master suite, standard neutral paint.