Crap Pilot
Good luck to the group if they are as good as you say, however I am on safe ground 99.99995% of the time making such assumptions, all you have to do is look around most GA airfields to see the state of most of the UK GA fleet.
If it is a no equity group and properly run at the costs stated the only way the owner can make a profit is to have a large number of people who pay the fixed costs.
However I can tell you that at that price some of the members are paying well above the odds for flying a C152 because they don't do enough hours. If there are a large number of members and avalabilty will be a problem and the members who are paying a large amount over the odds for the convinience of a group aircraft will soon want rid of an hours builder that they are in effect subsidsing.
What I offer is an hours building program that will work for the individual (or two individuals) who want to build hours quickly in a well maintaned aircraft and have no nasty suprizes on cost.