Number of Batteries?/how to make a battery bank

[travlenhippie]

i need some 'input' (haha), on how many batteries i would need for an average battery bank,, assuming i will use deep cycles....im also considering connecting these mini solar panels from wallmart that specifically charge batteries ...and would also like to hook them up to the alternator....is it possible?....the bus i have has a breaker box , and like 4 recepticles each with 4 outlets on them.
suggestions?
thanks!