if you are looking for a cheap little auto scrubber
see if you can find a used nobels 20" speed scrub, it is a nice little walk behind that isn't self propelled and it can be had for a decent price
run time on it is only a couple of hours but I have had one for 15 years, you can get it in and out of a van pretty easy with a small ramp and it fits just about everywhere
used it for doing 7-11 stores
I don't think this machine is for those that don't do much vct though..
I bought it for doing big open areas and customer wanted things done as green as possible in thier LEED building, if it wasn't for that I would not have bought it because it really doesn't fit with what I do and you would need a trailor to haul it around
I will leave it on site and use it in a couple of different builldings