I think its a great idea I know several of the dealerships here in Ontario do rent/ sell scrubbers and there doing quite well mine does not. I really like the idea you had about coming monthly to do the scrubbing. They are such a large investment that many companies im sure would not like to pay. However in saying this I feel like once you get in you will find that it is just or more competitive than forklifts. Cost of entry is low and im sure there are companies offering these types of programs. Do your research and make some call if the demand is there than get at it!!