Each house may have up to three doors, so your "l2p" tip is not very smart or economical.
Actually, they come out of the same door every time. You can even wire 2 doors on a 3 door house to force them to come out of a certain one. Watch Tightropes tips. Also, know your facts before you call me out. I made my post based off facts and experience - I don't know if I can say the same for you.