Looking for some advice from folks with experience in cleaning off small parking lots. We work a lot in a beach tourist community (barrier island) and have the opportunity to pick up several commercial accounts there. These are small strip shopping centers. They generally have a few small strips of grass, a number of shrub beds and small parking lots (20 - 40 cars). I'm good as far as having a handle on the grass/beds/mulch/pruning/etc. But what I don't have a handle on is the parking lot maintenance. The owner wants them cleaned off once per week. Naturally there is a lot of sand as well as some cigarette butts as well as some other trash. I'm looking to determine the best method/equipment to use. To considerations are that I need to keep the initial investment cost low and these are small lots. I have backpack blowers but I not sure they would be the best way to go here (other than blowing off grass clippings) as I need to REMOVE the sand and trash, no where to blow it to. I'm leaning toward a small vacuum style machine. I'm looking for recommendations on equipment to use and any other suggestions you might have regarding this service.