what would be the cost? for me I can get one at walmart when on sale for couple hundred bucks. Medium chest size. what may be nice is a wire rack to hold the frames. deep and medium size. that would be stackable, and fit in a chest type freezer. Same type you find in closet kits. or even a wood based rack. I lean mine on one side working across, they fall over and "decap" some cells then get drippy. Drawers in an upright maybe, would work.
Removable stackable something would allow a cheap freezer, and use for something else if the need arises.
Great idea not sure how to make it into a product that works. A) not many keepers per 1000 population, And B) many of those do not keep the frames to reuse. so the market IMO is small. But I am guessing, and have no actual data.
GG