So I got some LED switches on the way

Im gonna do this myself

I need to buy a batterie isloator so my batteries dont feed off eachother! You know were I can get one? I will Also need a new alternator! Were talkin in te 130 amp range at least! I believe my motor+ stock electronics eats about 60Amps and I got a 800 watt system+ 6 12" Neons a neon around my deck a small blacklight in the glovebox and I plan on having 4 more 8" noeons AT LEAST! Pluss I want power to spare! Can you calculate how much I will be usin when I slap this all together?