Originally Posted by Curmudgeon10
I read an article many years ago (I believe it was in one of the very first issues of Fine Gardening magazine) that showed how someone had used a trenching machine to create a slim, but deep trench that defined the border of the bamboo planting. In this trench, he inserted galvanized sheet metal and backfilled. The sheet metal will not last forever, of course. But perhaps it can do the job until you sell!
Doesn't even sound like its worth having at that point! I don't care how nice it may look, or whatever other purposes it has, it shouldn't be that much work to define a single aspect of your yard. Completely opinionated I know. Good luck to you though