I have had a hot tub for the past 30 years. After moving to The Villages, we installed a TuffSpa TT250 about 6 years ago. Take a look at TuffSpas - their patented cover is awesome... easily the best hot tub I've ever owned.
When we moved to our new home 3 years ago, we had the hot tub moved - no issues. We are here year round, and keep it running year round. We use it heavily during the colder months, but still use it for muscle soreness during the summer months. I keep it at 101 during winter, 98 during summer.
Nearly all hot tubs offer a 120v/240v option. The jets are the same with either 120v or 240v, but at 120v you can't run the heater and the jets at the same time. It also takes 120v a lot longer to bring the tub up to temp whenever you change the water. In Michigan, I really wanted 240v - here in FL 120v is fine - the hot tub doesn't drop temp fast enough to need to run heater and jets at the same time while you're in it, and when I change the water, it's good by evening.
My hot tub here is 120v... the cost to install a 240v service is far more than 120v, and requires more permits.
Another thing to look at is what you'll use for sanitizing the water. I always used to use bromine, but a number of recent clinical studies now show that long term effects of bromine result in hyperthyroidism. I've now switched over to a salt water generator (SWG), and it's been working extremely well!
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