You might want to look into coworking space. Also, talk to retail businesses serving other brick-and-mortar businesses specially the ones who do shipping, maili

You might want to look into coworking space. Also, talk to retail businesses serving other brick-and-mortar businesses specially the ones who do shipping, mailing, and provide mailboxes for other businesses. They tend to know about someone who might be willing to rent/share the space with you. I once paid $200 per month to a car impound lot for a stand-alone mobile cabin.