sorry Mark, I wasn't clear. I was referring to someone like you as a developing bee Farmer, having to purchase equipment for your own use, not as a potential reseller. National format will always be more expensive a its a limited market. For what others have said, boxes are also more fiddly and time consuming than the langstroth format to construct if you go down the DIY route. depends on the resources at hand. If you have time, facilities and capability available, the the worlds your oyster. I have little amounts of all three so stick to making floors, crown boards and roofs
. broods and supers get bought in as seconds. There are examples of other operations using one format for honey production and a second for queen and nuc production