Looking for affordable salon/at home stylist for highlights

Context: Women's haircut, long wavy hair, already highlighted

Any recommendations for affordable salons or stylists at home? Online some local shops have pricing starting at 400 for full head of highlights, which is out of my budget by more than double. I'm new to the area and hoping to get a partial or full head of highlights (i have thick+wavy and very forgiving hair, I don't need a master class just someone who won't fry it! I usually cut it myself but i have an event coming up i'd like it to look fresh for!)

Also -- what are you gals paying for hair here? I'm surprised by some of these prices and would like to be prepared before an appointment with how much I'll pay and what to tip appropriately. What are standard tips in the area? thanks in advance :)