Is the material bought and already delivered and on-site?
Very difficult to find builders in rural MN (or anywhere in MN for that matter) who are taking on work. I’m having a garage done right now, I booked the contractor in October of 2020. Currently, he has jobs scheduled into 2022.
A good resource is the local lumberyard, probably in Grand Rapids for you. They will know the local contractors, so make a long list and start calling. You never know, you might get lucky and find someone who had a job that got cancelled or put on hold for material cost, permit, or other reasons.
Also, when you talk to builders, even if they can’t do the work, ask them who they recommend. Some builders refer to others when they can’t take a job, so it’s worth asking.