You also get to be cash fluid which helps with having liquid reserves required by the banks/lenders.

Perhaps, the heating system is old and inefficient oil heat and you modernize it to a high efficiency unit with a cheaper fuel like natural gas.

Mindy  Sure here is another link also I've opened it up for long term stays and charge extra for amenities like pool heating. occupancy is 70 percent https://www.airbnb.com.sg/rooms/792049658049677604?

A lot of our residential clients who move to Milwaukee from other states cite concerns about excessive summer heat, wildfire smoke or lack of fresh water for their reason to move to Milwaukee and these concerns seem to grow every year.

Best properties should also have a pool and the pool should be heated.

Add on potential electrical main panel upgrades to handle the increased load (assuming no gas service, they'll be cooking and heating with electricity in the ADU), along with drawing and permit fees and you're maybe another $5k. 

Sure, you might learn some manipulative tactics and trick someone into buying something in the heat of the moment.

I have rentals about 20 min from one of the military bases in Montgomery.What I find is that the appreciation for homes is like watching yeast rise in an oven at low heat.

The volume of people, the traffic, and the heat in the 4 long months of summer combined with no outdoor activities.

What I mean by that is that older homes that cost a resident $300 - $500 a month to heat or cool do not stay occupied for long.