Oh yes, that is a dangerous thing Jessica. LOL I joined my upline's "stamp camp" before I was a demonstrator. It's basically what you're talking about. You committed to 12 months of camp, $25 a month, and hosted one month.
Was it worth it? YES! I learned more techniques going to a monthly workshop than I would have just hosting one every once in a while. (Plus, I didn't have a demonstrator before then.) My upline would show us 3 - 4 projects and we would get to make every project. DH knew that whenever I went to stamp camp, to not expect me home in 2 hours. We did quite a bit of visiting while we stamped!
Was it easy to stick with the monthly amount? Oh yes. LOL DH was very supportive in my addiction. We just simply budgeted that $25 in every month. There were a couple months where I could only do the $25, but most months I went over. Once the addiction starts, it's hard to stick to that $25 though. LOL
One thing I can suggest to think about, are you going to use the products you order? I had a gal who was going to my stamp camp, who never actually used the stamps she ordered. Her and her hubby are now divorced, and hubby brought all her Stampin' Up! stuff to church because she never picked it up. Her stamps were still unmounted. So my advice, think about the products and if you'll use them. If you're not going to use them, then don't do it. I'm all for supporting your co-worker, but there's no sense in spending money on something you won't use.