If you an handle 110v, you can handle 230v. I understand that it seems more difficult. The tub will need a dedicated circuit in either case. To convert right, you need a dedicated 120v outlet (nothing else on that circuit) and it needs to be at least 20A. You still need either a GFCI cord or a GFCI outlet.
If you have to run a new circuit, I would just go 220V. You can either run a 50A circuit to a spa panel (with a GFCI breaker in it) or do a 50A GFCI into a disconnect panel and then seal tight to the tub.
220V will heat faster, close to twice as fast. Can this tub run the pumps and heater on 110V? Some can and some can't.
I ran 220V for my tub. It was more upfront cost as 6-3 is more than 10-2 but mine will be on an enclosed porch and the benefits of having 220V made it worth it in my eyes.