Before you start leaning too heavily towards making huge amounts of power. Keep in mind that you're going to want to address the sub-par internals of the stock short block first before too long. I wouldn't plan on venturing too far past the 400rwhp mark without doing so. If you went with the base Mongoose Vortech kit, you could hover around that figure without killing the stock bottom end and it would give you time to start saving for a tougher rotating assembly and upgrades to the kit for when the time came to start making power.
Before someone chimes in….yes, he could run the turbo kit at lower boost levels for the time being as well until he was able to afford stronger internal components, but that still doesn’t change its initial $5,000 price tag.