Before this thread get's overrun with the incoming I'll make a serious suggestion - If you want to make any money, and reduce your personal exposure to risk, don't own the helicopters yourself! The bills get bigger than you might expect, and might well not be scheduled. Find local wealthy benefactors who are prepared to own, insure, and maintain the aircraft for their occasional enjoyment (at a loss), and lease them in an attractive rate, profiting from your additional margin and maintenance, if you can provide it.