yea like he said, it can be damaging, but it's not lethal at your temps. try getting an inline bro, if you already have one get one with a higher cfm rating, or simply just add another
lol you've never used craigslist?! well that's a first in my book. Basically, i just opened you up to the best classified site on the net. Realistically, almost every item you can imagine is being sold in your area, so get searching! craigslist.org
If it doesn't solve the problem, you'll still me bringing in co2 from the fresh air, which is always a plus. If that doesn't work (IMO, depending on the room/tent size, it wont be enough) you may have to get a dehumidifier. you can prob find one for 20 bucks on craigslist