Are you heating more of Texas than your own home?
A gas insert could be the answer. It's basically a stove that inserts into your prefab or masonry fireplace. A 3 or 4" pipe is run up through your existing chimney, plus reduction in the fireplace opening, minimizes the loss of heat. Which ultimately provides a much more efficient heating system.
The best of both worlds can be found with a gas insert. Not only are you saving money while heating your home, there is no clean-up from the soot, ash and dirt wood leaves behind.