This hand doesn't make any sense to me, it seems like heros hand should be good after villain checks turn in position. I feel like villain bluffed because he smelled that hero didn't want to play big pot, but calling that overbet with K10 is crazy. There is tiny chance that villain rivered a set. Why would villain check the turn in position is something that seems strange I think

Easy bet/fold on the river. It looks like a slow played 2 pair/set. Villain raised you all in and you have TP, hence cannot call. 

What exactly would he be bluffing you with here? If he was bluff calling you on the flop he probably would have bet the turn. Board is dry enough on the turn where a player at this stake might slow play strong hands? It would be helpful to have his call open stat from the cutoff. 

Without a read, folding here is definitely not a mistake. If he is a thinking player, he might think you are weak on the river here since you checked back on the turn and jam with his air. But this isn't going to happen enough at 30NL for your call to show a profit. Also, his air ball hands will most likely be betting turn to steal once you check to him.

think river bet sizing is too large. Im b/fing like $4 instead of $5.50. 

This is a good hand to check-call as the PFR. Most of their Kx have a better kicker, and your T blocks a bunch of straight draws.
You really can't stand a raise, but you can definitely check-call comfortably.

His river line really doesn't make sense. Do you have reads on him checking back sets on bricks? Does he flat AK pre-flop and play it in a weird way.

The problem here is that he checked the turn. If he had a missed draw, he likely would have bet it.
He also doesn't peel 22/33, so there's really nothing he can have.
Even if he were to raise KQ, he probably wouldn't go all in with it.

Reads are the deciding factor in this hand.
Leaning towards a fold in this situation.

Agree with most of the previous posters. I think 54s is a pretty likely hand too