I would seriously consider finding another wash and pick the owners brain, learn the ups and downs. You’re a self admitted newbie and that’s great you want to get into this but it’s not all going in once or twice a week and get your cash and go home. And don’t read me wrong , not being negative. There is ALOT that goes into these washes, SS, IBA and tunnels that people don’t consider. You came to the right place though, but you’re seeking advice that is very broad. There are too many questions. Like stated above , friction, touchless
, do you want employees??? Narrow the questions down and you’ll probably get more answers. Good luck!!