Well I believe Michael Owen & Owen Hargreaves get released by man utd at the end of the first season, well they did on my game, so you could try and snap up them. How much money do you have to spend and what positions need strengthening?
As for the stadium the only thing you can hope for is to win games so supporters will come and fill out your stadium, keep an eye on your finances, try not to go into debt. Don't buy players with monthly installments if you can't generate enough income to pay off the monthly payments. If you make money rather than lose it and you have a healthy bank balance then the board will at least consider your request.