I can't imagine how anybody tanks all the way back down to Div IV and still stays active in the game.
I did something similar in HT, from the top league and ended up dropping as far as V, while rebuilding my roster again from scratch. Got back up as far as II before I lost the passion for that game. But Yuck is right - you've got to really enjoy training, and I think you've also got to have some very real goals for building your team while you do that. It would be the type of thing here to see if you can train the ultimate outside isolation / full court press team, for example. I personally couldn't see doing it just as a money-making venture - tank a season or two, load up, buy your way back up, lather rinse repeat. That is what would seem pointless and dull to me.
