@Zak BocaI'll reiterate what @Tamiel Kenney1) Do a research of many different RE investing options out there to figure out what resonates best with your skill set/time commitment/availability2) Narrow your choice to ONE niche only.

Our ultimate goal is to pay off all of our rentals so we think it would be easier to do that by having less mortgages.

There are other areas of North Dallas that are better suited as investment opportunities IMO that will be a great area to invest in but I don't believe Frisco or McKinney would be my top choices, however other portions of North Dallas could be great.

You are going to be holding up your capital that could be deployed on easier projects for a lot of 'what ifs' in this process and from what I have heard, purchasing thru Auction.com has it's own perils you need to watch out for (not that I'm against using them for a home run deal).  

I’d tell them you have no choice and one must go to keep the peace in the building .

The other part is in your style choices and attention to detail.

I'm heavily developing the network direct to business owners for the two buildings, they are similar size/type so that allows me to target easier.

Selling your house can be easier than you think!

At that point it may be easier to get financed when you can prove cash flow. 

If you prefer a vacant building, that's actually even easier from a lending perspective.