Don't conduct business from your home even if it is the business address listed. Internet sales come to mind. That's the direction I'm going with my business. I'll keep everyone posted on how it pans out for me.
Personally I wouldn't want to sell firearms from my house. The internet on the other hand. I'll try it. If I do sell any locally, within a certain radius I may conduct business at a purchasers home. If I get deliveries it will be picked up at the shipping location and none will be delivered to my house.
Have you ever heard of a firearms dealer that delivers or makes house calls. Imagine being able to purchase from the comfort of your home. Paper work brought to you. Firearm delivered to you.
Just a thought. It could work well for people with physical disabilities.
that may want home protection but can't get out to file the paper work.
I don't think off premises business is legal at all. if you did it you would have to follow the same rules as a gun show, and that would be pretty tough to do considering MD's laws on gun shows. iirc you have to pay the state police for each show and you can only do a few shows in MD per year.
on the federal side, the business premises need to be available for atf inspection, I don't think your customers would appreciate that.