Eureka! Gabions! Hugelkultur raised bed garden!
So I planted a stake in the ground, tied a loop in one end of a rope, measured out 1.5 m, and made a circle of wire mesh (cut in half to make a 45x180cm strip). Then I made another circle about 15cm inside that one. I made a path to the middle, and I put in some wire bridges to keep the sides from bulging.
Then I told my slave child that I would give him 1 yen for every rock bigger than his fist that he could find and put in the wheelbarrow. Between the two of us, we got halfway around the circle in about 4 hours.


Should be able to finish over the next weekend. Might have to up the price to 2 yen per rock though
Next step is to line the inside wall with landscape cloth, fill the bottom half with the punky firewood and rotten branches, then cover it that with the the 20 years of leaf mould on the concrete driveway of the abandoned house, and maybe a dump truck of good black soil.