As far as the money issue goes, buying it in small bits is sort of like financing a complete engine. It just makes it a little easier to afford. I'm looking at the 4 stroke conversions right now and the Ryobi I can get for $119. Not a bad deal even if you add $200 for ignition and parts. at $319 for a 26cc 4 stroker with a great sound and knowing YOU DID IT seems like a bargain to me.