It's four kilograms with the lot. If you ask the Cavendish Cafe to hold hold the onion, bacon, tomato, lettuce, beetroot, pineapple, egg, tomato sauce or whatever else they put in it, you could probably get it down to around the three kilogram mark; but that's still a monster.
You turn right at Hamilton to get to Cavendish. It is beautiful country. The Grampians rise away to the east; Horsham is further north. They don't get a lot of through traffic. A giant burger gimmick is as a good a way as any to generate some publicity. Times are tough.