It’s not work it’s more like a hobby. Work is what people do to survive. See working class vs owner class.
Wealth hoarders can either obsess or not obsess about hoarding more wealth, like any person with a hobby.
So, how much time they spend on their hobby and what hours they spend on their hobby really depends on their temperament.
Walking meditation is just walking while bringing your attention intentionally to your body and your breathing as it’s moving through space.
It’s like walking while really enjoying walking. Minimizing distractions like thinking or a radio or conversation or whatever.
But seconding just walking all the same. As a teenager I used to put on my walkman and go for walks when I was pissed off at my parents.