Not sure who you are referring too. Building your own kit still requires an investment of time, tools, and experience. Building your own and buying a kit would still come out the same. On top of that, buying a kit new is the upper limit on how much you would possibly have to spend. Like I said, the most you would have to spend on an engine to get it to 500 hp is around $5000. If you are spending any more there is something wrong, if you spend any less then good for you. My point still stands.