I once had at a previous location, a beverage that was ~700-800 feet long using #22 silver, nylon jacketed wire. I had gotten a roll of double shielded 75 ohm coax from a friend and had about 400 feet on the spool, enough to feed two antennas with the coax buried out to the base of a tree on the side of the backyard. Buried them just simply by using a lawn edger going in on a slight angle to pull up the top layer, then following along and stuffing the coax in and then pushing down on the lawn and making a couple walking passes over the lawn for them.
One was used for my primary transmitting antenna, a trap dipole for 80 and 40 meters, the other one for the beverage. I sometimes used it for receiving in the amateur radio bands, but it was great for doing some medium wave and long wave listening. I draped the wire just over tree branches as I walked through the woods, all of about 8 feet off the ground. I didn't want to have any wildlife take it down, so it was high enough for Bambi to stroll through.
My longest beacon reception was in Alberta (from Massachusetts) and lots of different graveyard stations on medium wave. I wish I had kept the logs, somewhere along the way they got lost. I had lots of fun using it, even for transmitting via an L-network. It worked great after a hurricane took my trap dipole down, and most of the tree with it.
