[rwest]

I wonder if it would be cheaper to install more than one so you don’t have to have a unit that goes the whole distance?

Maybe do some remodeling before you get too old that consolidates most of your daily needs on one floor to limit your need to move between floors. Put a bedroom and bathroom somewhere on the same floor with the kitchen and maybe the laundry room too?

You could find someone to stop by occasionally to check on your mechanical systems in the basement and get water and temp alarms on the equipment too.