Michigan is a bit different than other states. You can't build a small charter boat. You can build a big one, but not a six pack.When you get this mod done, it will almost be time to build another boat and make it the way you want it this time..LOL. I've never been on a boat with a sea keeper, guess I need richer friends.
We don't have uninspected vessels in Michigan. Basically, if you have a big boat, Coast Guard handles everything. If you are classified as uninspected by the coast guard. Michigan DNR does their own licensing and inspections. Coast Guard has rules and standards for a custom built boat, DNR does not.
Trust me, it would have been much cheaper and easier to build a new boat from scratch but I wouldn't be allowed to run it in Michigan. You have to buy an existing hull and title made by an actual boat builder with plans signed from a marine engineer. Any changes to that original boat have to be inspected and signed off, there is a process for that.
It is a unique little ecosystem here on the Lakes, you have to roll with the rules already in place.