I just moved so no longer have propane, (electric heat) When I did have propane it was only 5₵ more per gallon. The propane company owned the tank, but I owned the regulator and everything beyond that. In other words I owed anything that could possibly leak.
When they put it in, they used that plastic pipe, had a leak the first year, a gopher had dug down and chewed a hole in it. When I asked why the heck they would use plastic, they replied they only have problems in areas where there are farm fields nearby. duh I lived across the gravel road from 400 acres of corn. Even though I argued they used the wrong product for my application I still ended up paying for the propane I lost, plus the cost to run a new copper line to the tank.