Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.

However, I don't actually care as long as they are not bringing in clients, displaying signage, storing materials, etc.

Materials have to be stored somewhere , usually the last room to be done . 

They were owners of warehouses that stored hundreds of pallets of goods sold to other businesses.

Is there a local store that sells them? 

It helped create a better sense of community in the complex because everyone felt they were a part of something having ID badges and it helped out the community and local businesses by having loyal customers coming to their stores.

Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.

Local restaurants and grocery stores? 

I also suggest that the tenant install a camera that stores videos of the driveway, then when tenant has proof, you can send notice to owner next door that he is to eliminate hazards he is creating, or you will sue for damages, especially if it costs you tenants, as they can’t afford and shouldn’t have to deal with repeated damage.

I'm considering doing the work myself getting a helper from a paint store or something