LOL!!!!
Funny, because my dehumidifier is not doing the trick either - unfortunately, don't have the headroom under my table to put a bigger one in there, so I might just get a massive one for whole garage, which should take some pressure off of the one that I have (same one as you).
Also, how many CO2 tanks do you figure you'll be running through for this harvest? I'm on my third in a month of 24/7 vegging, and my tent is half the size of yours - that's why I think I'm just gonna run a natural gas line into my garage and get a generator.
EDIT: Rhaba, do you have your dehumidifier drain into something, or do you manually empty it? Asking because on humid days, it fills up in about a day, and I was thinking of draining it into my clean water reservoir - the water comes out at ~6PPM, which is basically the same as my R/O filter (3PPM) - plus, it'd be nice for it to always be running, that would probably help a ton.