I am also from Texas. Central. Too much humidity may make mold so it does need to be controlled. I also found out that if you have electronic or computer machines they need to have consistent temperature. I ruined my computer machine by leaving it in my room that is not attached to the house. It got too hot and too cold in there and ruined the monitor screen. I put in a window unit that is a heater and A/C all in one unit, but it does add to the utility bill. A gas heater does put out a greasy film over time. Electric heaters might be a better choice. Maybe it would just be cheaper to add central in the long haul if that if possible. Your comfort is important too so you can enjoy what you are doing. Congratulations on your purchase.