Need help figuring out budget brushless for revo!

[R00ST]

So to run 5s I would have to run a single pack right? Is there any way to run a 3s and 2s pack?

Do u know the capacity on the e-revo's batt boxes? I was hoping to run two packs but I am thinking two 3s packs might be overkill? I mean..truly you cant have TOO much power :) BUT I also want good run times without having to scrap the factory e-revo battery boxes.

How big of 3s packs can be fit?

Is there a price floating around that the MMP will go for? A feigao 10xl or 11xl is what I was thinking.