I don’t plan to heat the pool except maybe to jump start and extend the swim season a bit. I’m told to expect $150ish increase on the gas bill in order to heat it for a weekend. I’ll be heating the hot tub on a regular basis though.
Be really really careful when it comes to heating it... You can read about my epic saga with the gas company in the "So get this..." thread.
Here is the pool that Tony from Ridgewater built for us about 2 years ago...