Vegetables and constant slight starving is supposed to be keys to a long life. But that sounds like a punishment for life.
I have a mature wheeled excavator so I can crush rocks, hurl stones and make holes and roads for fun and meditation. I have almost toppled that one over a few times, and that one even has 4 wheels. Thus I guess I know how I'd end up with a biped one; it will be one of those "I have fallen and I can't get up" turtle stories. (I guess it takes some minimum of talent to handle).
Excavators are true multitools by the way: Excavating (duh), levelling, hoisting, carrying, raised work platform, bulldozing, crushing and breaking stuff. And plenty of specialized gear to attach and expand to that.
Robot Pro Wrestling. Wow. Now there you have a project for dad too