Dr. Doom is the shit. Its an awesome Pyrutherium bomb (i think i spelled it right, lol), which is totally safe for your plants. I also grow in a basement, and yeh its pretty fuckin humid down there. I had to scrub the shit out of my walls n floor before i got down to business, but once i got everything going, humidity wasn't a problem . I did spend a couple hundred bucks on a Dehumidifier, but i really didnt end up using it until the last 4 wks of flower during my last run. As long as your gonna keep a constant watch on your environment since this is your first time around in the basement, then you should be fine, and if something goes wrong, youll be able to catch it in more than enough time to get shit fixed with no permanent damage done to your dope run. You'll be fine man. Nothing ventured, Nothing gained.
--N as for bugs not being a big deal, dont listen to that shit. Spider Mites can come outta fuckin nowhere, and they are a PAIN IN THE ASS to deal with. Get a couple of cans of Dr. Doom Pyretherium bomb, and douse your entire basement with that shit. Afterwards, start up your grow, and you'll be golden. If by chance Spidermites end up appearing anyway, then hit up your local growshop n buy a box of LadyBugs man. They fuckin protect your plants like god damn Sentinels, lol. There's also sprays you can check out, along with things you can add to your soil to make sure you dont get any creepy crawlies in your soil mix. But dont over-anticipate problems man. Be aware of the possibilities, but dont sweat it until you think its actually becomming a problem. Bomb your shit once, and git to work
Good luck man, hope your grow goes the fuck off
-K1.