Wouldn't be the first person to have vehicles registered in a different county. Years ago i told people no one moved to weld cty for the quality of living, they did it to avoid emission testing.
For those who have to plate a trailer. A 4 x 8 cost $75 per, which was more than i paid for it. Give CO another 5 years and we'll probably see safety inspections, again, once enough for the children people immigrate here.