The good thing is that we've got plenty of material for a stone wall and stone paths between the beds. Like Monty Python sang, always look on the bright side of life.
After 3 hours of digging, we finally finished our first bed. All in all, it probably took us 3 days of digging 3-4 hours a pop.
After that kind of workout, the rings in the garage provide a great stretch. I'm looking forward to the day when I don't feel like a broken woman after a bit of digging.