Sorry to hear about leaky pipes, I am unfamiliar with the Earth pipe stuff - ran Uponor (cause family member works there); but how about this for a war story/NIGHTMARE.
Was on a job site in Northern MN, large campus that over looks Lake Superior, went to bury lines from boiler to building starting digging trench and WHAM hit bedrock 2' down! So to try and get the pipe deeper, blast a channel thru rock lay pipe (had to splice to lengths together cause buildings were like 400' and of course up hill. No problems the first 2 years, then all of a sudden we get a call in the 3rd spring, they had a geyser in the mechanical room. Apparently the splice had broken or leaked causing water to enter the jacket, at that point was higher than the boiler room, so water comes rushing down the hill, in the jacket and erupts into the boiler room, NOT A FUN FIX or CHEAP