I wouldn't worry about advancing just for that. All the drafts are aware of money. If you have extra gold concentrate on upgrades. Join ax club to accumulate draft picks
Don't know exactly but once you get past the legends teams its changes to the inferior teams. I would say you have about 10-15 legends teams to play first
Once you get past a certain number on your win streak you start playing teams that are vastly inferior to win. With the 80 boost you can play pretty much forever. They still have to use the win streak glitch to get that far.
The way the game is now it doesn't matter how good you are or how much you play if you play legit you will have to spend a lot of money to succeed at this game