fuel
I hate to be the one to say it, but if the expense of fuel is to much for you(14.00 a gallon) then you should reconsider getting into helicopters until you are more financially stable.
I mean if a case of fuel($52-$60) is to expensive then what are you going to do when you plow your chopper in, and have to spend a few hundred to get it back running again? Or how about blowing a few 6.00 plugs because you get the mixture wrong.
Look, I will be perfectally honest with you, helicopters are expensive, and if money is tight, you should wait until it is not so tight.