Here's an idea for those who find hovabators undersized. It's not mine. It's from a turtle husbandry pro who deals with far more captives than I likely ever will.
He simply unfastened the internal mechanisms in a couple of hovabators and refastened them to the lids of big styro fish boxes. Tripled the size, and he incubates all sorts of species in this fashion. One of those things that would make anyone go duh!
Better still, for anyone who wants to use that route but doesn't already have hovabator(s) laying around, GQF Manufacturing sells all of the replacement parts so that you don't have to pay for the styro shell if you're not going to use it.