Cab Question

I've been reading up for awhile now, and I think its time to try my hand at a Cab grow. I'm trying to keep this first grow simple due to my limited practical knowledge and hands-on experience, so it looks like bag seed and CFL's to start.

Here's my question, while searching for an appropriate cab I came across the following: A wood Armoire that measures 21"D X 37"W X 61"H
Since I can't post pics yet, here's the link: http://jacksonville.craigslist.org/fur/293992447.html

Would this be large enough or should I look for something bigger? And, around how many plants could it theoretically hold?

Any help would be appreciated.