You're looking at fifty bucks of flat fees, plus about half of one percent of what you paid. The value-based part is deductible from income taxes and drops each year.
Plus a VIN inspection, which most police departments do for five or ten bucks. One time only, on cars from out of state.
I don't think emissions testing is required if you're going to be living in Routt County. It's mostly a front range/plains thing.
Legally, you've got thirty days from becoming a resident to make that happen.
Drivers licensing is supposed to happen immediately upon becoming a resident. When I came from Illinois back in the nineties, I just needed to give up my old license and about fifteen bucks. I don't remember even having an eye exam.
The only insurance required by state law is liability. $25k I think it is. Most county clerks won't give you your plates without it.
Suggestion: make sure you've got decent uninsured/underinsured motorist coverage. That's a bit of a problem here.