In that case, I'm sure your zoned residential only. It could still be commercial/residential, but not commercial in the sense of your operating a business of this or any size where others live, breath, eat and sleep. Zoning won't allow first because of parking restrictions and probably your ADA non-compliance.
No matter how you want to paint it, no matter how many blessings you get from your landlord, other tenants or your insurance aunt.... if something happens because of you running a business in there with inks, chemicals and other partially dangerous elements, you would be crucified in less than 10 hours after anything happened.
It's great that you have these ambitions, but ignorance of the law will only not help you, they will sometimes make you into a poster child so others don't do the same thing.
Right now, you're flying under the radar and no one cares, but your inks might have a slight smell along with your cleaners and other things you need to conduct business. Therefore, somebody could blow the whistle on you and get you closed down in a matter of hours. Then your insurance would probably drop you for stretching the truth and the landlord could be forced to evict you.
If I were you, I'd stay under the radar, and sub this stuff out, until you can afford your own place, a garage or some place to set up legitimately.
Good Luck..................