A:Answer 1. If you read the page, you will see a part titled "Highlights" that mentions that this is NOT a Smart TV. However, you could add Smart TV functionality by the separate purchase of a Fire TV Stick, Chromecast, Roku, etc.
2. Search the Best Buy website for wall mounts to suit your needs. Don't ask other people to do basic work you should do yourself.
3. Unless there is a limit mentioned, I am sure Best Buy will be happy to sell you as many of this or any other TV as you could want or need. 2-3 would be no problem. A company I worked for recently had to buy 30 laptops at one go, retail (from another dealer) and we had no difficulties.