To be honest if its not approved then I doubt that you would get much interest. Folks are not going to pay £50/hr plus £35 for an instructor if nothing is loggable or can be counted towards revalidations, etc. YOu may as well play on MS Flight sim.
Maybe you could push it as an added attraction at your club for people to practice on in their own time and charge them when you work out what the hourly running costs are. May attract some new students and pay for itself that way.
J.