I'm not a breeder (yet!), but tubs are hands down the easiest set up, in my opinion. I have a few free-standing tubs for my snakes. It's unbelievably easy to maintain humidity and temperatures in them. They're also a breeze to clean. Plus, they're much more wallet friendly than tanks and the subsequent gear you need to maintain them. The only issue is that the room has to stay reasonably warm, because you don't have the option of using a heat lamp for an extra boost.