Who do you traditionally use?

 One more question... should I sell with a traditional agent in DR or is there a website that markets airbnb listings for sale?

Also, traditionally the summer is the best time to sell and the fall is worse, so I'd ask the agents about that too. 

Some other great resources I recommend as a real estate investor myself are: "Rich Dad Poor Dad" by Robert Kiyosaki, REtipster (www.retipster.com), and Rental Income Podcast with Dan Lane.

Something that will help shed some light on this is reading Garrett Sutton's book "Start Your Own Corporation" as well as Robert Kiyosaki's "Rich Dad's Guide to Investing".  

They are old ranch style single family homes built in the 50s (1,800 to 2,400 sqft, 3br) located in one of the traditionally best regarded neighborhoods in Houston, with values at over $1 million dollars each.

Andrew Carnegie, is quoted as saying "The way to become rich is to put all your eggs in one basket and then watch that basket." 

HML just went to private money to give the allusion that you are going to find some rich doctor that is going to lend you money at 5%. private money  hard money is quite competitive these days.. you can plan on 2 to 4 points up front at close and 10 to 15% interest  plus junk fees and rehab draw fees appraisal fees etc etc. some of the larger national lenders have their pricing very well spelled out on their websites you may want to get a baseline from themKiaviLima one Lending oneetc etc..

The banker said we would have to start with a traditional construction loan.  

That's the kind of talk you'll hear from every get-rich-quick guru on the planet, kind of like "7-Minute Abs" or Hydroxycut weight-loss pills.Just look at what he promises: you don't need to use your own money, you don't need to inspect the properties, you'll spend very little time on the deal, you aren't personally liable for the loans and debt, you'll work less and earn more...This can all be true if you know what you are doing.