Its a central heating and air system that disperses hot or cold water to each unit through a network of pipes.

Here are some that I'm aware of:- Galvanized pipes - typically 40-50 useful life, could rust from the inside out, could get eventual pipe failure- Zinsco or Fed Pacific electric panels w/ aluminum wiring that could be a major fire hazard- Wiring in general (e.g. knob and tube)- Asbestos in the walls- Lead paint- Heating system - boiler?

Smoke detectors, GFCI outlets, handrails, working heat and hot water, etc.

Now, the headlines are saying things like we may have avoided a recession, the FED stopped rate hikes, Mortgage rates are dropping, Housing markets are heating up in 2024.  

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.