Really good thread Florence. I'm time-rich cash-poor as well. ATM I'm making microwave lemon butter for gifts. It's hard to exercise in the heat here, so maybe we should swap locations - 10 minutes in our sun would give you a lot of vitamin D!
I will definitely try the authors you recommend - I have a Kindle so I can download them easily (love being able to do this!).
I find de-cluttering something helps, but I'm not at the same level as my DIL you de-stresses through housework.