Not familiar with spa techs, but most skilled personnel in my area get between $20 and $30 per hour. Call it $25 plus % of health insurance, something towards retirement, holidays, paid time off, WC, GL and vehicle...should be charging $75+ depending upon all your insurance costs in your area. This, of course, for your own employee. If hiring an independent tech that you supply steady work to...$60 sounds about right.