Spa maintenance?

[starry_solo]

A friend moved into a house with an above-ground spa (Cal Spas, 8 person capacity). She's never had to take care of a spa (or pool) before so is hesitant to start.

She lives in Southern California (Riverside County) and is wondering what the typical price is for service (one time service to drain & clean, check for leaks/maintenance) as well as monthly service (is it done weekly, bi-weekly?)

Looking for advice.

Thanks!