Sure there are local conditions regarding soil, but I am curious as I am in the process of getting ready to move my antenna and go with a buried ground radial system. Two years? More? I picked up 1000 feet of bare braided 18 gauge wire and am going to use that instead of using my 14 gauge THWN sheilded, which will want to roll up on me when laying it out. Trying to make my life easier with the bare wire. But, I may still come back run about 500' of the 14 gauge as well, depending on how ambitious I get. I plan on running them at 33' each (roughly 30 total for 1000') for a 26' antenna.