garage

a separate place to do any work that causes dust is the answer, whether it be permanent walls or makeshift out of expexsive plastic, ( unless ya could save up enough Wallmart plastic!???)...
if ya lucky and have a concrete floor! paint it with a good porch paint or any good concrete sealer. if it had a drain in middle that would have been great!, hosing it off keeps floor clean, BUT all that dust will accumulate on all shelves, etc no doubt. LOL