eh, just like the auto hobby shop, you have a set of basic tools that gets put out in the bay, and if they want more, they check them out. you hold their license and a credit card or something of the sort, and return it when it gets returned. but i forsee liability and hassle not being worth it. Sure, if someone comes along and has money and the lift isnt being used, maybe. but most likely its just going to cause hassle. "hey, i just need to use the lift for a couple hours and do my suspension." and then 4 hours later and 2 broken rear Lower control arm bolts later...they're still on the lift and you have 2 clutch jobs that need to be done as promised...