The main thing the rules say is cheating is to transfer a player for much more than his value as a way of transferring funds. For example you can't sell a $2K a week player for $2M. But if a player is estmated a being worth $200K and someone is willing to legitimately pay $500K for him then his real market value was $500K.
You want me to promote up to JBBL with no arena, spend all my money on overpriced players whose value will drop 90% in two season so that you can stomp on my team and tell your self what a great manager you are for beating a team with 3 or 4 less seasons in the game than you....