I agree, more horse power means more money. If your planning on building a 300hp car, chances are you won't have $10,000 to dump into right away. Personally, I would go with one of the better known kits like Drag or RevHard. That way you get (almost) everything you need for turbocharging your car. A kit is good starting point to build up a high HP car. I suggest doing your homework and installing the kit yourself, but make sure you have somebody standing by for questions. Its the best way to learn. From there you could start adding on and rebuilding as you get the money. Just make sure when you start adding on, you plan ahead. Don't buy parts you won't need later. But thats just my oppinion.