Meh, I say let 'em buy players, and spend the whole season paying their salaries.
As for me, well let me put it this way - I never considered Lauri my 130k PG a rental. Had I won the league last season, he would still be on my roster helping to try and keep me up in ABBL.
I could have kept him and afforded his salary all season too - it's just that I would've been committing myself to my roster as it was with little flexibility to change or add players. By selling him, I know I can still get a very good record with my current roster, be competitive for the title, and it gives me flexibility to assess my needs later in the season and plan my moves.
Looking to be a tougher season though than the last, good luck to everyone.