

My goal was to never need to touch the settings for any of the HVAC units all year round,
I got a lot more luckier than you. I have a single floor, three bedroom place. All I needed to get my setup to an acceptable level was a programmable thermostat.
The other snag was more fundamental - I don’t think it’s possible to have a perfect temperature, even for one person. If I’m sitting still for long periods, I tend to want warmer temps. If I’m cleaning the house, I want cooler temps.
I set my temps for warmer in the afternoon, cooler in the evening/night, and semi-warm again in the morning. It’s not perfect, but it makes getting to sleep and waking up a lot easier.
What about hanging it vertically?