I’ve always used a “post box service” or “private post box” and
typically you can use a suite number instead of a box number. In
addition, it’s a commercial address, they hold packages for you, and
I find it well worth the cost. No more boxes on the front steps -
that’s worth it right there!
So your business address can look like this:
Bright Star Metalworx
12345 Galaxy Avenue
Timbuktu, CA 99999
Add your business cell phone number to your correspondence and
business cards, and you are all set. Nobody is the wiser. Note some
cities will require you to register your business license at your
actual address, which makes it public if people look for
it, but much less exposure than having your shipping and
correspondence go there.