I would say that in order to get any meaningful idea of the interest there might be, you need to give some idea of the sort of rent you would be charging. Everything has its price.
It's no good asking people how much they would be prepared to pay as they'll obviously say as little as possible - ie something like £5/day, which obviously isn't sustainable.
So ideally you need to work out how much you would expect to pay for a suitable machine, how much you would need to hire it out for to make it profitable, and realistically how often, and then maybe put an advert, giving the price, on Facebook, local newspaper etc, which will give you a much more realistic idea of the local demand, than posting on here which is nationwide.