Dunno, it seems overly complicated and larger than necessary (I live in a small apt so I am biased). Keep in mind the UV source (not present in most microwaves) is the most expensive part of the cure box so I would simply save the space by putting the UV source in something smaller.
Formlabs posted this project for using a nail curing lamp to post-cure parts complete with a link to the cheapest UV powered lazy Susan ever. That is to say rotating platforms aren’t that novel and shouldn’t be your basis for a container.
That said if you have the time for the conversion, the space for the final product and enough electrical knowledge to convert your microwave power supply to the correct input for your UV source it sounds like a pretty cool project.
Be sure to post some pics of it if you do go forward with it!