We live in Central Wisconsin and most indoor storage here is not heated, so we have to winterize before storage. There are several threads on this forum that address the use of your RV in cold conditions, just use the search function. Everyone has an opinion about the best way to survive in the cold, but be advised that the Midwest has some pretty severe conditions (-20 F or worse) at times that will make life in an RV downright miserable, maybe even dangerous. Good luck on your upcoming ventures.
Denny, Connie & Shadow (former barn cat made good)
2000 Itasca Horizon, Cat 3126B, Freightliner Chassis