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You must live in a mansion. I have been doing this for about 8 years now. The Zvezda, Pegasus ones that have bits to assemble always leave me with awkward sprue morsels so they take up a little more space. I can usually get 3 or 4 maybe 5 Strelets sets per box. I get a massive roll of plaggy bags from Poundland for £1. Empty ice cream cartons are quite good to store unattached bags in. I think I am one of the few people in the world to have a worn out a sprue cutter though I do use them on my kevlar toe nails (don't do this kids always wear safety goggles and have a responsible adult present).
I am such a good bunny as I recycle the unwanted boxes not store them.