Cheap lipo idea?

I still think it'd be more than enough, you see the vid of the Savage on 6s? I don't really need a truck like that, I'm thinking 9xl on 6s will be stupid enough......and super loooooooooooong runtime to boot!

Speaking of runtime, what could I expect from, say, 8000mah on the 9xl? Don't ask about the source or how I'd afford it, but I think I actually can make this happen. Oh, and ludicris as it sounds, it's very feasible. :D