After almost 29 years in a group, which had been running for years before I joined, I was a founder member of a new Group in May. We're still not settled.(I haven't left the old Group)
There is a Group bank account into which the monthly payment for hangarage, insurance, etc is payed by direct debit.
The hourly charge is aimed at making a profit after fuel to cover routine maintenance, engine fund, improvements, etc. We pay our months flying less the fuel we've put in directly into the account.
I use a simple Excell sheet to record my flying expences, and email a copy to our treasurer.
We use a free online booking system.
We have a simple log sheet in the aircraft, from which the official aircraft log can be completed.
We arranged insurance before paying for the aircraft.
4 is not a good member number - we're split 2 v 2 at present over some decisions.