I get the whole being on a budget thing. We're building an Xmaxx very slowly, part by part. It will cost a few hundred more than buying it RTR, but I can't afford to buy one all at once. Something slways pops up that requires any money I have saved.
But the SCX24 is one of those where the parts are fairly overpriced.
If your plan is to go with aftermarket stuff, that changes things. So are you wanting to build a stock one? Or mostly aftermarket?
Just as an example, a guy I know built one with all Treal components, and has well over $500 wrapped up in just parts.