I'm with Grendel here, don't imagine we'd have got an answer. We don't really have a right to know. Assume the best idea we'll get is when the accounts are released, but that's quite a way off yet.
Not strictly true as the season hasn't started - Rente was an issue because he played games in the second tier. Think Belgian league is classed as a lower tier than Dutch league though so don't think he'd have qualified on club games alone.
I think they'll be safe. Not sure a playoff push is on the cards. They've made a couple of solid signings, but nothing that's really wild quality. What Sunderland did last year was pretty rare, and that was mostly on the back of the Diallo signing (on top of a solid squad).