@Mckaryo, Adding heat to a warm room may not be perfect, but maybe an incandescent bulb will help dry the area out. Point it at a fan not the plants.
As for moisture absorbing agents on a budget, kitty litter is a lot cheaper than charcoal and more effective. @MG2009 is correct - you will likely be too high RH in flower if you cannot address that. Good luck
Following along! I just started some fastbuds! If you're interested in watching them grow in organic living soil with minimal salt nutrients, take a peek at my 3 new diaries!!