I have no employees.
I have a cleaning crew that comes in daily on contract, and I'm on site 3x a week, totalling about 12 hours. The cleaning crew will do really minute repairs like vac handles and will alert me if there are real problems.
I don't think that's enough time, but its doable. I don't think you can get by less than that.
I could raise my prices if I had more employees, so I think that's also the real question to ask... What is your niche?
A $11/hr employee costs $16 or so an hour, and finding good help us tough. Lots of turnover. So 80 hours at $16 runs you about 1280 bucks a week. That costs you over $5000/month. I think about how much price increase and volume increase it would take me to cover 5 Grand a month. I know my customers and I don't think they'd pay for it.
There's one other car wash close by and they are insanely expensive, but have a full staff.
I realized I can't compete with them on quality, so I picked the low cost model. My customers tell me they are happy, but they are more forgiving of equipment being down or whatnot... They tell me that. I can't disclose the details of that car wash but I got the financials when I was looking to buy car washes. All I can say safely is they make a lot more revenue than me, but they don't make more profit...
So what's your niche? What's your volume? What's your neighborhood like? How much time are you putting into it?