Might sound a daft idea Jay, but could you try advertising the ramp2rent thing via some different routes?
Rather than the traditional newpapers/magazines - perhaps try joining all the local car forums within say an hours travel of Warrington - as you well know, car enthusiasts are always after doing their own mods and doing it on a ramp with someone experienced on hand has got to still be a niche in the market.
Also, could you put ads on ebay? I've noticed there are garages selling servicing packages etc.
Just airing a few ideas in case you choose to give it another month or so.