I am opening a shop tuesday and now I am second guessing myself now.December is probably the worst month,but the shop is on the main street and the rent is only $900 a month which includes elctricty.It has two bays and a lift.MY plan is to get machanics who do moonlighting work and charge 25% of each job.I plan on doing mostly dealer and whole sale details.I also plan on doing hand washs at $25.00.In the back of my shop is a super stop & shop and it has a drive through car wash with a blower.I have aguy who can drive the vehicles over to it. prep it,spray the wheels lower panel scrub ect,run it through and bring it back.wipe it down spray wax it ,vac,windows and quick console wipe.The car wash is $5.00 so I would make $20.00 PER car.