I would spend a lot more time in the garden and at the sawmill. So many projects would get done, (new barn doors, new barn siding, greenhouse, saw shed, outdoor kitchen / pavilion, full kitchen remodel) the list goes on and on. I'm pretty sure I would be just a busy as I am now just with a different focus.
The real question is would I sell my business? At my age it is a real possibility with that kind of steady income. Definitely a nice thought experiment...