well thats if you buy the engine new i got one homey for free from my future father in law who has an electric now. the other homey i got on ebay for 22 bucks. i dont plan on getting a CH ignition but rather sticking with the magneto's that came on them. the mount and prop hub i make with my dad's help(because he has access to the tools since he is a tool maker). now i might get on ebay and get a walbro carb or two that has a bigger opening for 15 to 20 dollars. now at the most for one engine i have 40 dollars spent when the zenoah is 299 or 399 i forget. it has the magneto as well. i will still have a reliable engine however spent alot less. i have a used cap 232 i bought for 125 bucks that is the right size for the homelite. i wont get unlimited verticle but i am not a good enough pilot to take advantage of that anyhow. secondly i learn alot about how small 2 cycle engines work. its all based on the individual choice i feel i have more to gain by converting in the long run than buying a 400 dollar engine.