You'll need an expensive generator to run welding equipment I'm afraid so it's not good news and even then a cheap welder is not going to be the best to run from it. An inverter based machine would be best suited to generator use but something like 5 to 8 Kva would be the recommended size to run it from.
Are you any relation to Arthur "Two Sheds" Jackson ? (Google it if you don't know him)