I read something about creating mules and let it fish all day in tlunia forum. You get 15g per character each day and since leveling is so easy atm, getting to lvl 50/60 shouldn't be hard. Can't seem to find the fishing article in tlunia's forum but the idea is creating tons of mules, like 30 or more. Then do nothing but finish your daily fishing quest to get the gold.
*Am not bothered to test *