I am getting Direct TV installed this week with 2 HD receivers and 2 sd receivers. I'm not really sure at this time how many receivers I really need (family member or two are planning on moving out). Would it be better to just have Direct TV install 2 more receivers since they will do up to six for free and if I decide in the future that I don't need all of them can I just have them turn them off? Would I have to return the receiver as soon as it is turned off and would I have to pay to return it?