I am remodeling my wash and I would like input on where the best place to place my vacuum islands. Right now they are at each end of the building. It's a 4 bay ss. I am buying the land in front of my vending and change machine. I plan on paving that lot to make it easier to get in and out of the wash. I am willing to saw out my concrete and I was wondering if I should place one of my stations in front of my change machine? Thanks for any input.