You don't need a few million, but you better have a few more dollars lying around for maintenance, gas, and insurance. http://www.robinsonheli.com/price_lists_eocs/r22_eoc.pdf estimates operating costs at $140 an hour.

I expect that to be on the low side, given it is information from the manufacturer, and given that I spotted one white lie: they get at the $140 by assuming 8 gallons per hour, then derive $0.90 per mile from that, but casually mention a speed that uses 9.5 gallons per hour at cruise speed. A tiny difference on that $/mile figure, but it would add about $8 to the 'dollar per hour' number.