We’ve got a ‘rigid’ hot tub. Got it in March. Absolutely love it at the end of a day.
It costs £9 a week in Leccy. Most of that is not keeping it heated but the jets as 3kw x 2! A good quality cover keeps the heat insulated. So it doesn’t drop off temp to much over the day. We use it most days.
We nearly had an inflatable but saw it as a halfway house and chucked the extra at a powerful 2/3 person one. The cost is a big jump and we were well positioned to fork the extra cash out. Ours sits on a concrete base in a discrete part of the garden :).
Chemicals you check every couple of days. Straight forward chlorine testing strips. Only issue we’ve had is with grubby friends that don’t shower before. So I would insist on showering for all that use it, otherwise you may get foaming etc. All easy to deal with.
One of the best things we’ve ever bought.