The only one here is in the local feed store, so it's kinda like what you want to do. It does well here. There are couple groomers, but most of the dogs up here are huskies. They occasionally need a bath, but rarely full grooming! The store sells cat, dog and livestock supplies--higher end stuff, better food and fancy toys, along with basic horse/cattle stuff.

I used to use the carwash ones when I lived in Calgary. One was one our way home from the dog park so I often stopped to hose Earle off before we got home!

Right now, if I have to bath one, I take them to the humane society. They have a self-serve grooming room that costs 8 bucks for 30 minutes to rent. But you have to supply your shampoo, towels ect and clean up. The one at the store does all that for you.