Last year I bought a few new poly hives very cheaply as they were in a closing down sale. The were deep national hives, also called 12x14s, at the time I thought this could work well, but my concern since getting them is that my girls will struggle with the inspections with the bigger frames. It's surprising the weight that is in a frame.
I might still use these, but while we have some standard national hives I'll use those first. I still want to use them though, so I decided I'd use them as bait hives.
Bait hives are used to try to capture wild swarms of bees, that have swarmed naturally (or from someone else's hives).