IMO 110v plug and play hot tube best way to go, no permit's required small less water to fill. Can be plugged into any 110V outlet cause the safety cut off in cord. Draw back less future’s than 6 K plus ones (which now are probably 8k or more now.)
I’ve had both and IMO they will maybe last 5 years before they start having parts failure and that’s if you routinely do maintenance. Parts are not cheap for repairs. (cheaper it you can replace parts yourself).
Only way I would get 220V is if the house was already wired for one, but that me.
https://www.homedepot.com/p/2-Person...107304#overlay
I like this model if they ever become available again I like the lay back design.