Also, for DFW specifically, the North Texas Real Estate Information System (NTREIS) is the MLS for the region and has all the statistics on the local market. 

One of the main reasons I like buy and hold investing is because I can systemize it very easily.

We install flex and ductboard systems, insulated metal sweats worse than these materials. 

Are these just the poor areas of town, or is there a more systemic issue holding the area back from being a good area to invest in?

I have about 12 years experience with a BS in Electrical Engineering and a Masters in Systems Engineering. 

Greg,Thanks for replying.I have been torn on whether or not to separate into 4 different heating units (costly to say the least). i can't find any flow meters that would work like I want on a fuel oil system. nat gas is not an option.

The neighboring cities are more expensive to purchase, but better areas, have better school systems, but cash flow less. 

If you pulled the permit as a homeowner...you've already tried to sidestep the system and now have a problem.  

I have used it myself as a renter and think it is a pretty user-friendly system.  

Generally, sellers use the NROC to weed out people that won't take care of the property, and eventually end up opting out.To be fair though, the L2O system is set up to reward the owner if the buyer makes a mistake, because they can keep getting NROC from new buyers when old ones are evicted/decide to move for whatever reason.