Does anyone remember 'Ron' AKA 'Jack' RIP, it's the same US idea, pile it high sell it cheap, but IMO there's not much sway if things go quiet or a machine or van goes down as you have a crew sat around getting paid for doing nowt or you hire them a van but that comes out of the profit.
Looking at a half price cleanind in your area leaflet the other day and even they are expensive compared to these prices, I think that their lounge cleaning starts at £18.
Shaun