In Fable 3 for the Xbox 360, you probably know how to get an unlimited amount of gold by using the item duplication exploit.
If you would rather get money the regular way, then you still have options.
Early in the game, find one job that you don’t mind doing (lute hero, pie making, or blacksmithing) and buy all of the chests available for that job on the Road to Rule. This will give you better money when performing well on those jobs.
Do that job enough to make some money, and start buying properties around town. Businesses are the easiest because they don’t require any upkeep. Modify your prices or rent to high or highest if you don’t care how your town people view you.
This won’t necessarily make you rich quickly, but doing this early in the game will give you an early start, so that you’ll be making plenty of money while you’re progressing through the story.
Also, make sure to visit the Sunset House demon door once you’re the ruler of Albion, which is all that demon door needs to be opened, giving you an easy 1 million gold.