Can this sunroom be disassembled

Yes, it can. Or did it come in one big piece when you bought it?

The questions you should be asking are: 1. Can this structure be disassembled without damaging it? and 2. Can this structure be reassembled again?

That type of structure is typically assembled with self drilling screws, which means using the next size larger screw on reassembly if you want a good grip. They also usually have the glazing secured with silicone adhesive caulking which makes it a royal pain to try to remove the glazing without damage, and equally a pain to clean the remaining caulk off so it can be reassembled neatly. I'd look for other options for providing access to move in the new spa if you can find any.

Good points. And when the house is sold and/or the buyer/OP wants the spa out - what happens?! ;0