What is the best way to switch these lights. We plan on locating the switch on the house next to the sub panel not on the light pole
What does your Client want to do, as far as the way the Lights are controlled?
Ask the Person(s) with the responsibility and Authority to make these decisions (like who signs the check, wanted the lights, etc.), what controlling methods are wanted for these lights, and quote prices accordingly.
There's about 10 "Best" methods I can think of right away, for controlling these Lights, ranging from a "Simple" approach using a 2 Pole Spring Wound Timeswitch per each 2 wire circuit, upto "Detailed" approach, involving time clock / photocell / over ride timeswitch driving a Lighting Contactor.
One major Question:
Does your State / County / City require Energy Conservation Compliance?
If yes, then you will need to control the lighting per the Compliance Documents of that Commission.
Just my $0.02