We must insure, before anything else, that your power feed can support the voltage of your new spa.
The panel must contain sufficient space to welcome the spa's new circuit breaker.
The wiring must connect the spa to your electric panel. Sometimes making holes in the gyprock is necessary.
We must install a disconnect switch outside for your spa's electricity.
Burying the cable can be very problematic depending on the ground soil.
The distance to cover can be problematic and will also determine the cost.