I've been underwriting an old warehouse (built 1940) that needs a complete renovation/gut (reno cost would surpass building purchase price). 

It’s the same temperature right now in MN as is it is Vegas.

Then pick a niche hotels, restaurants, industrial, multifamily, land, warehouses, office, medical office, flex, or whatever.   

While using a glue with a floating floor will help with separation issues in variable temperature.

Currently, I work for Cushman and Wakefield managing 4 Class A office space buildings and 4 warehouses.

If the heat isn't above the legally required temperature they might declare the unit uninhabitable and boot the tenant out until the situation is rectified (which will of course be a day later when they can come back and verify the temperature is back to normal).

So, I would install a vent that automatically opens and closes with temperature like this:https://www.lowes.com/pd/Air-Vent-17-5-in-x-9-5-in-Plastic-F...3.

These “premium” options will rent for significantly more than a typical bedroom, and having a “premium” option in a house is sometimes the deciding factor in whether the property pencils out.Moderately important: temperature & HVAC control.

The one the plumber sells will cost him less than that, and he may try to talk it up as better than the "big box" ones, but it's probably about the same.Add maybe $50 to that for parts - like a new temperature/pressure relief valve if the new one doesn't come with one, maybe new flexible water lines if it's not plumbed in directly, maybe a new shutoff valve. 

Hi Illya, Columbus has been booming lately, thanks to big names like Intel (dropping a cool $20 billion), Meta, Amazon, and Google setting up shop with warehouses and data centers.