They’ll have to make this thing very ornate. While it might be house inside something, I wouldn’t expect it to be, nor would it need to be. Without looking at an aerial, I would assume you would queue in the courtyard area where the bands play and the hedge garden is, correct?
An exposed carousel would be just perfect there. The strollers it’ll bring, on the other hand...
Last point- A carousel should take, what, 6 months to build? Max? Watch this take 2 years.