It is unfortunate that you can’t spend more time in a house before buying.
I got to look at my house one time and then decide I was willing to pay an obscene amount of money to live in it the rest of my life.
There are questions that just don’t get answered. Where did the previous owner park their car? Where does the garbage go? What is weird about the house? Unfortunately the last question can only be answered after living in it for a while. I knew there was something odd about the house, I just needed to find it. I quickly found that it was the HVAC unit. My HVAC device is 17 years old. It can live up to 30 years with proper maintenance. I don’t know if I can last that long with this machine. Inside the home when it runs is quite loud. The air blowing out of the indoor air handler makes such a loud operational noise. I also know it is quite dirty inside and I should spring for ductwork cleaning. Those are problems for another day. The real issue is the outdoor unit makes a high pitched whistle sound. It is so loud that when you are outside it is pretty painful. I have called HVAC dealers to fix it and they said my brand is known for doing that. I could replace the whole inner workings of my HVAC machine and it would still whistle. I just need to endure it until it dies. I wish I would have known that when I toured the house. I would have offered less money because I knew I would be buying a new HVAC device.