In owner mode set your advertising budget as high as you like and play or sim your game. You can sim all games in a week except Monday Night Football. Go back into owner mode and set your advertising budget back to zero, then sim any remaining games on the schedule for that week. You will get the added attendance and revenue of advertising but will not have to pay for it. This does not work if you host Monday Night Football.
Get Any NFL player you want for a very cheap price:
During the franchise mode, go to view rosters and select any player you want. Go to that player and edit his position to the weakest position that player can have. For example you want to get Brian Urlacher to your favorite team. You will have to change his position to HB/RB so his OVR will be at the lowest point. Then Trade him out of that team for any player or low draft pick. When he is finally in your team, release him as a RB and resign him back to the team and you will see how cheap he can be. After resigning him back to your team, Edit his position back to his original MLB position and fix your Depth Chart to ensure that he will be playing on your frachise game.
Get whatever team you want to be on in superstar mode:
Go into superstar complete all the things up until draft day. Then When you get drafted, if you don't like the team simulate pre-season until there is one day left. Go to options save. then turn autosave off, go to the map, agents office and demand a trade if you don't like either trades exit without saving and you start on your original team and ask to be traded again. Do this until you get on the team you like. This works throughout your whole career.
Thanks to Revolution Readers zieko and Cris Almighty!