Help purchasing equipment

im not a programmer but i have an idea of what i want, can i get some help on what equipment to purchase to complete my mission… Please!?

i want to run a tether to an arduino unit from a PC
control 4 brush less motors.
return camera to PC

and in the future be able to add sensors to the unit.

it would be great if the equipment allowed me to use an XBOX controller threw the PC for input data.

my thoughts are that i need 2 arduino boards, 4 motors, 4 motor controllers, Ethernet shield, and… ?
but i don’t know which ones of what to get. any help will be greatly appreciated!!