I agree with Sencha. 4,000w is more than you need in a space like that. if you are gonna be growing tall plants (4' +) then go for it but 600's will serve the purpose. you don't design the lights around the footprint of the room. you design the lights around the footprint of the plants. you aren't going to have plants covering the entire 10x10 space or else you wouldn't be able to walk in the room. chances are you are going to need other equipment like dehumidifiers, fans, ac, etc... too.
figure out how big you are going to grow your plants and how much room they are going to take up. then design your lights around that. 2 600's on either side of the room will give you a 2' aisle in the middle of the room to walk and for equipment. you could do 2 1000's too but in most cases that would be overkill. 2 separate rows will also make it easy for you to have a 30 day perpetual harvest. harvest one side of the room every 30 days.
wiring up a light controller is a good idea. you do need some basic electrical knowledge though. i wouldn't recommend "splicing" anything. get a dedicated breaker and hardwire the light controller to a 30-50amp breaker. then if you can; get 240v power cords for your ballasts. this will allow you to run the controller on a smaller breaker and wire size. getting an 8 light controller would probably be a better idea. then you could run the inline fans on that controller as well. you are still going to need to use the outlets in the room for inline fans, wall fans, ac, dehumidifier, pumps, etc... make sure you have enough room on the existing outlet circuit for that stuff.
good luck.