Buggy on 4s, Truggy on 5s, MT on 5s.

I was thinking for a Savage setup... 8xl (BP motor), MMM esc (can upgrade to a nicer motor later, or 6s), 5s Zippy 5000 mah. Then either a FLM conversion, or a Kershaw conversion mount... Any thoughts? I have seen the 8xl, and it rips. It would be a budget setup. $170 for the BL setup, $80 for the Lipo, and then maybe $70-$100 for the conversion setup. Such as aluminum spur, pinions (5mm)... I am just praying it wont run hot. That is only ONE possible setup. The other is a truggy, and a buggy is ruled out, pretty much...