I think he's dug himself into a cushty position with Brentford, the supporters like him, no great pressure to win anything, not bad wages for a relatively small club. He'd be mad to walk away from that to come here IMO.
He's going to be expected to be challenging at least for 5th, has to use the squad for 4 competitions, doesn't really have any attacking players who are game changers, supporters likely to be on his back, doesn't really have anyone who suits the role of captain, doesn't know what's happening in the transfer window. players that seem to be often injured. protests going on to get the Chairman ENIC out, lots if derby matches that he'd be expected to win.
Is it worth it?
He took the 14th best paid Brentford in Championship to PL and kept them in midtable...taking a 17th placed tottenham to top5 even with Europe is not a difficult job.
He lost his start striker Watkins , then he improved Toney and got the promotion. When Toney got banned for 10 months , he changed their attackign style from direct to through the lines and playing with pace with Mbuemo & Wissa.
If anything, lack of resources has never been his problem. Infact this very thing makes him the best fit of all managers linked
You listing those issues makes the case better for Frank appointment