When I looked into renewing I did the maths and the group costs for me are £45 a month and £35 an hour, so if I only do one hour a month it is not that much cheaper. However for the price of two club rental hours I can get just under 4 hours on the group aircraft and so am more likely to keep current and not have to spend money on constant checkouts.
Well on your figures that works out at £80-90/hour for a club aircraft - not many places in the UK where you can hire at that rate I would have thought - where are you?