I think Franklin taking that Penn State job when he did was a bold move. It's literally paid off for him though.
But I don't think he wants to be in the SEC again, and Penn State was one of the most "protected" Big 10 jobs around (they always have a favorable schedule and only get tested once or twice normally).
No clue where he ends up, but based on the sort of expectations he seems to prefer I wouldn't be shocked at all if OK State is a spot he'd land.
They can pay as well as anyone else, pretty solid location for recruiting considering all the talent around the state, in a conference where you can thrive and likely only face 2 or 3 really tough teams every year and the bar for success isn't really that high there. It took Gundy going 3-9 and starting 1-2 before they were done with him. Franklin likely wins 8+ every year there.