i don t really see any good side to a setup like this besides saving space .
when i powder i like ti have lot s of light . but in this case the lights would have to be inside the oven so all that extra powder would stick to and cure on the lights. the cleaning problem woud be time taking too .also with a big oven /booth
you have to be inside the oven to powder the parts (possible dust problem there
when i do parts i like to preheat my oven so that the curing temp is reached faster for a better finnish( imposible with this type of setup)