Hello everyone - thank you so much for the responses. Dmitri, while living in the property we refinanced the house owner-occupied cash out. A couple of years ago, while our tenant was living there we went to several banks to try to refinance the property, but we were told according to Texas law we could not do that as investors. To answer your question on raising the rent, we have had the same tenant for six years, she is great and did not want to lose her. We have raised the rent on her twice already. Six years ago when we first put the property up for rent, there were 3 other homes in the area we were competing with, so ended up lowering our rental price to be competitive. At the end of the day though, the taxes are killing us. We fight property taxes every year on this property. What started out as a positive cash flow property, has turned into no cash flow years later. Calling around the neighborhood at other rentals in the area, we are a little below average on rent, so there is room to raise the rent. The currents tenant lease is up March 2016, so we are trying to be proactive and figure out what are options are. I know that if we sell the house, it will most likely be sold to an investor or builder. If the property is going to be torn down and built on and sold, why not us? I have not heard the term "pop-top", so I am going to look it up and start reading up on it.
Nicolas - would love to bounce ideas around, will be in contact soon.
Cal C - thank you so much for your advice. I am currently reading his book on Flipping Houses (LOVE IT), and will download the book you mentioned.
Again, thank you again for everyone's time and response. I really love this website!