You need to decide first whether you wanna use a van or a car, secondly a lot of shops want the main shop window done traditionally as they don't want customers walking in with wet feet etc. Next you need to decide what height you plan to work to. Once you have decided on all that then you can start to look at systems cuz you'll know what you need, not what you want. If you want any more help then this is the right place to be, think twice cuz you only want to buy once.