Taxes eat you up in Michigan and Indiana, unless it is farm land.
Buy the spot, you would like, to have a home in, and have a home built. I know it cost some up there to get a foundation below the frost line but generally you can have a home built, for a third, of what you will pay, for a home, already built and it is probably not up to your standards. Yo uwill save a lot on taxes outside of towns, if you have fire service. Many places do have fire service and water service beyond town or city limits. You could save more than enough to have the motor home garage with hookups and even heat. Be sure to put in an auxilary generator and tank for when the power lines go down.