Aiming for 12k for a stadium by div3 is a great goal, I believe my relegation was due in part to panicking about my outmatched team, and wasting money on talent as opposed to growing the stadium. Don't stop at 12k, though... to be honest, I think I'm gonna spend a few seasons here before I try to make the jump again -- so I hope you guys don't mind me hanging around :)
I learned that you can go from Div5 to Div3 in 3 seasons, but it's just not enough time to properly formulate a team to succeed in the long run. There's no sense going up and down and up and down, so if any of you are open to advice -- take the time to do it right!
I'm looking forward to the season here, active forums make things so much more fun. Good luck to all!