The regular cost is tyres tyres tyres. I race RC scale cars once and even then, those damn rubbers make me bleed.

I can only imagine when scaled up it will cost 10x more.

Actually to be completely honest if you have the talent and no money by now someone would've signed you up.
If you have money and no talent you won't be here asking questions about cost.
If you have neither, then maybe its not for you.