I have been using aluminium 1.2mm welding wire for my beverages for years it comes in 1 pound and 10pouns reels an is very cheap. One of my beverages has been up for 7 years with 300 feet span without no sag at all, This wire are very strong and if you choose a type that is salt water resistant it will last for years. App. lengt for 1 pound reel are 300 feet. 73 Ken