Your gonna need more than 60 amps unless you plan on separate flowering rooms on a flip flop or something, and even then you're pushing it. How many grows have you done in the
past?
This is a pretty huge grow you're goin to attempt. Seems to me like you need to do
some research before starting something this big. You're going to need roughly 10,000 watts to light her up properly. If you don't have the experience I would just section it off and start smaller. Then you can expand as needed.
First thing though, definitely need more than 60 amps. I believe a 1kw light uses about 9 amps, and you should neve run more than 80% of your full circuit load. So really you can safely use 48 amps at any one time. 4 lights puts you at 35 amps, leaving you with 13 left over for all your fans, dehumidifiers, pumps if running hydro/aero, etc.
I don't wanna storm on your parade or anything, just lookin out. Good luck.