[Goldwingnut]

Linda,
I have not put my pool in yet but will be shortly, however I can answer your questions as I just move here from Haines City, about 60 miles south of TV where we had a solar heated saltwater pool.
January/February - yes you can use it but it will depend on a few factors. Obviously if it is gas heated you will have no problems however if you live at the south end of TV you my have to get a tank burried in your yard as the homes do not have natural gas service. If you have a good southern exposure for solar panels then you should also be able to use it most of the time. I was in our pool on Christmas day and the water was 84. A solar blanket help a lot but is a real pain to take off and put on.
Solar heat is the least expensive after the initial cost since the heating is basically free (except for running the pump). With other heating methods it will depend on the temp of the pool and outside and if you use a solar blanket. Gas is the cheapest these days. A heatpump is also an option but it will be expensive to run. Our plan is solar with a gas heater to supplement during the winter months. If you are going to do solar don't be afraid to ask them to install an extra panel or two if you have the space, it will help during the winter months.
Saltwater pools are great, once the pool and liner fully cure there is very little needed beyond a 40# bag of salt every 6 months or so. The only other chemical I've had to add is some stabilizer which is about $2/lb. Other maintenance would be cleaning it - vacuum/brush it once a week, about 30 min a week. Every month you need to clean the filter, I've used the same one for two years without issue, just rinsed it out with a jet of water every month. The only unusual maintenance item is the cleaning of the salt cell every 3 months, it takes about 20 minutes including the time to remove and install it in the system.
Overall the pool will add about $50-$75 a month to your electric bill for the pump to run. The cost of heat will again depend on the method used. If given the option get the 30 watt LED lighting insted of the 300+ watt regular bulb, you get the savings and multiple colors. Saltwater is much easier to maintain chemistry on and is a lot more comfortable to be in. If you have a dog that likes the water and you allow them in the pool there is no chemicals in the water to bother their skin.

There are nay-sayers other there who will discourage you from putting in your own pool with the main reason being there are so many community pools near by in TV. Yes there are many positive social aspects of the community pools but having you own in the back yard is fantastic! Nothing can match a 5 AM swim followed by a cup of coffee and the newspaper in the morning or a quick late night dip under the stars to cool off. And sometimes you just want a quick 5 minute dip to bring you back to life, more difficult at a public pool.

If you have more questions just drop me a PM.