Wow! This is a brilliant idea, and is perfect for my situation with a "defenseless" account that just went to TH10, and does not want to hold any more gold.
I use quotes around defenseless because I am a TH10 with two lvl4 ATs, a lvl4 cannon, three lvl3 teslas, four lvl6 ADs and a handful of traps. This weighs me below my clan mates who are traditional TH7s, but I can attack much higher since I have max loons and other high troops with king/queen and a 35 capacity CC.
I don't really want to hold any gold at the moment, so building and canceling might work out once in a while...expensive wars, though!




