Vehicle ownership in the US is managed by the States, not the Federal (or national) Government.
Each US state requires vehicle owners to have some sort of presence in that state.
If you don’t live in the US, the easiest way to create a presence in any US state is to create a company in that state. Limited Liability Companies are the simplest form of company in the US.
Montana is the best state for non-US residents to own a vehicle. Why?
- Montana doesn't require a US driver's license or social security number to own a vehicle,
- Montana doesn't have any vehicle inspection (emissions or safety) requirements, so you can buy your vehicle anywhere in the US, and it never has to come to Montana to be registered here, and
- Sales tax on vehicles in Montana is 0%. And since sales tax is due where a vehicle is registered, not where it's purchased, owning a vehicle in Montana can be hundreds (or thousands) of dollars cheaper than owning a vehicle in another US state.
So, owning a Montana LLC is a quick and easy way for non-US residents to own a vehicle in the United States.