You are in MN, so you can do this like I do in MI - well maybe.
If you have a garage or basement that gets cold,you can ferment your lagers. My basement cold room gets to 48F, and that is where I used to ferment. Now I do it in the big refridgerator known as the garage, where it gets to the 38-42F range depending on the weather and and the in and out of the cars (heat sources when going in hot). In this application I add heat via a controler and a termogrid (and a light bulb, but the beer is in a SS conical).
For lagering the beer goes into a chest freezer, packaged in cornies. A second temp controller is set to lagering temps.
You need to think fermentation and lagering temps. If you plan to do many lagers, you will need to have one of each.