It's been a while since I've hired someone to move a spa, but it's a service that a lot of movers offer (see here https://threemovers.com/moving-services/ )- at least last time I checked. As I recall, the prices varied quite a lot too so it's not a bad idea to get in touch with a couple options before making a decision. As for the going rate, that depends a lot on where and how far you're having it moved. Any companies that move spas should be willing to give you an estimate for free though.