Or just get a GLi.Net router, and get the OpenWRT firmware right out of the box without even needing to flash it manually.
As a bonus, if you ever have the need for one, they also have some badass travel routers that can use your phone as a modem, take a SIM card natively, or just connect to an Ethernet/public WiFi to create your own secure network. Super handy if you do a lot of traveling, because they can be used in hotels or cruise ships. Know how cruise ships sell internet access per device? Yeah, your travel router only counts as one device. Set that bad boy up, and now all of your devices have internet.
Yeah, New Mexico IDs and license plates both say “New Mexico, USA” for exactly this reason. So many people have almost been illegally arrested and turned over to ICE by incompetent cops during traffic stops. Cops will pull New Mexico plates over, see the New Mexico ID, and demand to see visa paperwork because they think the person is from Mexico.