I also have multiple tenants in the Ohio market that are part of the voucher program (CMHA & Eden).

It sounds like your current property manager may not be marketing the rental effectively, and the fact that it's listed incorrectly as an apartment instead of a duplex could be turning off potential renters.

In this I hope that I can link with someone that can provide more insight into the local market.

Also, confirm market rents support your investment.

Utilities included.Fully rented.For sale off market.

Warn them in the marketing (example: "This is an old house and noise travels between units.

I don't think either Southlake or Frisco are good rental markets. 

I won't be out-marketing anyone. 

I.E. you know the area better than others.Is there a short-term rental market where you vacation at, where you went to college or where you grew up in?

I, too, am in Tampa and I've been a lender/banker and a Real Estate investor in the market since 1996.