Seems like you are stuck on a typical express format, and feel comfortable with the detail component being treated like an orphan. Candidly, and with only the best intention, I feel that you're making a mistake that will cost you dearly in lost revenue as well as customer retention. The plan reflects a basic lack of understanding regarding the flex-serve process and its unique cost-effective savings and management benefits of centralized labor and the positive flow of the process. Looks like an equipment vendor may have convinced (and maybe confused) you to go heavy on self-serve vacuums and the unaccommodating rigidity of the express wash & free vacuum process primarily due to a lack of understanding of the proven performance benefits of flex-serve. By doing it, you will mistakenly sacrifice two-thirds of your potential profit... without ever knowing it. Even if you initially wish to only operate an express format, it is still foolish to avoid planning for the eventual upgrade to flex at a later more enlightened time. Bottom-line, the operation will needlessly leave too much money on the table while sacrificing a powerful competitive edge by not upgrading to the flex-serve format. Depending on the site and marketplace, the oversight may be critical to your overall return-on-investment. I suggest that you seek a more competent architect or planner... as well as better information of your site's potential. While this may sound harsh, it is truly intended to save and improve your chances for success.