In the summer it basically would be another license in the boat so, I would be fine with twice as much as the license.
It’s not really the equivalent of another license in the boat though because you’d still be restricted to the limit of your single fishing license.
I think that two lines/angler should be legal without any extra fees because I don’t like being nickeled and dimed all the time but if they want to charge for the privilege, charge something low like $10.
Other than initial administrative fees to change regulations, etc., it wouldn’t cost the DNR anything extra if two lines were allowed.
I fish in ND a lot as well as MN and two lines are legal there all the time. I like it.
Two lines doesn’t mean that you’re killing twice as many fish or even catching more fish in many cases and depending upon how you’re fishing, using two lines isn’t always practical anyway. A limit is a limit no matter if you fish with one line or two lines.
That being said, only being able to fish with one line certainly won’t deter me from fishing in Minnesota.