Also think about some of the practical issues - flying a group a/c for an hour will generally cost less but will have increased financial risk and will take more of your time; instead of walking up (possibly after waiting for the last person to rent to get back
) doing a pre-flight and flying you may have to open the hangar doors (ours are ex RAF and could be beyond the older or petit pilot), move some a/c out of the way (they could be heavier than yours!), pull yours out to the apron, put in some oil and fuel then fly then do the reverse when you get back.
Availability is the other big issue, a large group can be cheap and good value but if everyone wants to fly at the weekend you have a problem and a lot of discontent. If however you can fly mid week and all the others want the week end you will have tremendous availability and flying subsidised by the others. Best check the booking system (on-line is best) and/or the tech log to check out usage patterns.
Good luck
P.S.
I had an hour in the air today, organised at an hours notice, the hangar was open and the exit clear - and it cost < 40% of a club spam-can on a frequent flyer deal - so it can work
