listen to this then, for a 2 meter 3D aerobat

in the UK a YS 160 dingo with hyde ARI mount and propper hatori header and pipe about 600 GBP

in the UK an electric setup:
Macker C50 Xl with 6.6:1 (there abouts) Gearbox and a 90A ESC, 2x 5s2p lipos (wired for 10s2p (5000mah all up, 14c discharge)), prop, ESC, mount, top of the range shultze charger and a programmer for ESC about 900GBP

YS 30% fuel about 30 GBP a gallon, youd use this in about 2 weeks, so, it would take 10 weeks to pay off the electric setup. even tho the Lipos go off at about 200 cycles that way over a years of flying, then it would be 400GBP to replace them, then it would be payed off in about 15 weeks of flying

thats y i like leccy so much. with the new brushless and lipos i dont think IC will last too much longer, giveit 5-10 or so years an it will be very much a minority