you’ll get caught by someone eventually and commercial leases don’t have landlord/tenant law protections, meager as they are, so be prepared to move at a moment’s notice if discovered. But you could get away with it for years if you’re lucky and careful. Worth considering whether or not its really worth the extra space/savings to live like that, sneaking around with the sword of damocles hanging over your head (eviction), and having to disguise your home as an office or workshop or whatever

and even if the landlord doesnt catch on or doesn’t care you may get found out by the building inspector. I know a lot of “artist studios” that people were living in for years at a time go shut down that way near me.