Just chill & think sensibly,dont be in a rush either,im not an electrician by trade but ive been wiring my own shit for decades,it really is simple as pie,open your panel before you do anything or buy anything,this will tell you if you can add breakers to the existing panel,if you have open spots then take a few pictures if needed then go to a real electrical supply store & show them what you have & tell them the service you want,they will give you the right shit.green air products and C.A.P inc makes a sub-panel with a timer trigger for 8 lights on a 50 amp with 2 /10 amp plugs on there too. its pretty cool just about 400.00us and pissing me off that i have to put a new breaker in and run cable . i looked it up and for 240v 3#4+1#8 cable and 50'(about another 200.00) is the voltage drop off point. i need to open the panel. God today i will lose a finger i know it i dont like electricity or should i say over respect it. i know i am not going to listen to the home depot guys i will be dead.