I am also a newbie of sorts (work at an exotic vet), and I went with a tub as they are easier to maintain. I had experiences trying to keep humidity right at the clinic and it was ridiculous.

The moss has worked really well, I used the tiniest of tiny bits and it keeps the humidity well.

As for breeders I went to Royal Constrictor Designs and he was awesome to work with. Very kind and answered all my questions. The shipping process was easy and my snake didnt seem distressed at all. On top of that my snake is beautiful and is a fantastic eater.