Cost of JP5A is circa £65,000. .We pay (5 in group)£80 p.m.and if any large bills come in we pay a fifth.Annual bills would be paid by the member as a %of his flying hrs that year.i.e if you don't fly it you should't be subsidising the other guys for the check on the seats,annual etc.. .Hourly cost is fuel only which is very very expensive due to the rate it consumes it.Fuel is 180 galls p.h.which is £245 if Jet a1 is 30p per litre