Though, if you print and ship all the postcards yourself, just note, you have to go to the specific post office where the zip code is located.Also, just be sure you have a lead generation magnet to offer. 

I'm usually by myself, so I put my magnetic "realty services" sign on my vehicle & walk around carrying a clipboard & camera, no one has approached me about trespassing yet.

The Arlos have a magnetic back so they can be moved to say an electrical box or drywall corner frame.

Magnetic door stops are the best, many of the friction type actually can damage flimsy interior doors, and if they are just a cheap spring "stop", they are no help when the wind slams the doors shut.

I do so much marketing online, bandit signs, my car magnets, driving for dollars, yellow letters and word of mouth i usually get plenty of leads that way, just wanted to try out a list company. 

Both of those are stain magnets and hold on to them.I would change to a white set of 70/30 Cotton/Poly blend.

If an engineer says this was from settling and there is not further risk, I would come back with a grinding disk and take off any high points, then a crack chaser wheel to clean it up, and then put in a backer rod if needed and top with a self-leveling PL sealant.

Maybe order a car magnet on Vistaprint for advertisement.

Would using a car magnet work well?

To rebrand the area, you've got to magnetize it... meaning it needs your promotional efforts, design, vision casting, and passion.