I'm slightly surprised that people are saying this hand is a call on 3rd. I would always raise 3rd, and I would see that as being successful even if I only got the bring-in to fold.

Check and call 6th. Putting villain on a draw is a potentially dangerous leak here. I can't see how you think you are ahead more than 50% here. Putting him on a draw is looking for a hand you can beat and then deciding he must have this. This can be expensive.

Given the way you played this, I think you could get the extra bet you spent on 6th back by check/folding the river with one pair. It's very obvious he can beat a pair of kings here.