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).

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. 

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.

Disclaimer: the numbers are all ballpark to give a sense of the positions being presented.Real estate:The venue itself is a covered space that is considered outdoor but has the ability to be enclosed.

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.

We purchased two properties in Upper Peninsula, MI that each need extensive work  - foundation to roof.This is a growing town with outdoor activity and climate migration its primary draw. 

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

Likewise for outdoor showers, surf racks, saunas and a clean, non 70's tub with a walk in shower.

@Robert EllisIssue also is all the printing is being done in controlled environments Once they get outdoors and deal with temperature, humidity and sunlight it changes concrete dramaticallyThis is one reason it is slow moving as they have been saying for years this is next big thing.

That's why I am building a hybrid hotel/apartment community with automated entry, exit, and communication, on site amenities (pool, gym, laundry, outdoor courtyard with kitchen), located in the shopping and restaurant areas, and adjacant to major transportation corridors.