It is well worth considering the options that you will have around the location if you want to enjoy your work after 70. It may be that what suits you best is to work from home, to have a minimal amount of travel and then find the clients that will respond to that.

I remember a very, very experienced professional who’d had some big corporate jobs and as he got older and more elderly, I would meet with him regularly.  He told me that now, as he moved into his mid-seventies, all he believe he should do was watch and pray.  To acknowledge this, he had a lapel badge with a heron.  This is a bird that stands very still watching and then goes in and makes a brief intervention to catch a fish.