I don't see why, really, you can easily win 1 or 2 tournaments and open up shop in the towns you've won, roam a bit, then some other tournament quest pops, and keep doing this indefinately until you have enough fix income, you can also buy some Acres and let that make your extra income for long term shots. Once you get a village with your businesses running, there's no way for you to lose money, your income will be pretty steady actually...
On a second option, you can always use tweak mb to change the amount of output from your enterprises, generating more gold, and, if you wish, to raise the amount of income from fiefs too... I don't see why you would need the tournaments, specifically, to be changed...