For this to work you need to make a copy of your game save on another drive(I used the cloud save on my xbox 360), and you need the elements that are on the totem pole for this to work(I had to create a new save since i used all the stages of the totem pole when i finished the game). If you only have the first 3 skylanders you can keep repeating the first stage of the totem pole by following the steps below.
The best way I did it was to go through the levels as fast as i could and never touched the totem pole with the elements on it, i stopped at creepy citadel and after it saved i went to my xbox settings and created a copy of my game onto my cloud saves. After that I played the game on my cloud save and just did the totem pole to collect money. I exit to the main menu of the game then went back to collect the next stage of the totem pole and so on. after I could not get anymore money from it, I go back to my xbox settings and recopied my hard drive save over the cloud save and repeated the process. I hope this helps anyone.
