for whoever thinks about starting out with a 30, here is the reason not to...
daz is thinking after 5 gal or less about a 50 or 60 size heli, so the $250+ he will be spending on upgrading could have been spend right away in a better place (like fuel....)
fuel consumption is of course a consideration, but the awesome power of a 90 is just not comparable with a 60 and the power of a 50 is just not comparable with a 30.
so please, don't by a 60 if you are even thinking about a 90, by a 90 right away...
of course ideally it is better to learn flying on a less powerful heli, because it is a piece of cake to do those maneuvers on a bigger ship, but there is no reason to not go big right away (if that's what you want to...)
and fuel economy: come on guys, how many of you are driving a truck or sim. with a fuel econ. of 20m/g or less (i know it has nothing to do with it, but somehow it has... )
good luck, daz...