Here in Montana, ALL vehicles 11 years old or older can have PERMANENT license plates. No renewal, ever, as long as you own it. However, Amateur Radio Operators can not get the PERMANENT sticker for their call sign license plates, because their FCC license expires every ten years!
ALL trailers, regardless of size or type, also get PERMANENT license plates, as do all motorcycles (including street-legal ATVs).
We also have no sales tax. If it is ever passed, it is limited by the Constitution to 4%. However, we do have a State Income Tax.
Just something to think about.
The PERMANENT tab will cost about 3 years taxes. My motorhome and ATVs have it, but the budget wouldn't handle it for the truck this year, and the car will get it at the next registration date.