While our group of 6 Jodel was out of action, over the summer, several years ago, I looked at this. There would have been no problem leasing, for serious hours building, but our previous group summer usage indicated that it would be too expensive. We did not fly enough.
Lease terms per month, with a minimum hours, to be payed whether you use them or not.
Check around, and see if you can make the terms pay compared to hiring.