StevenS

If you put him on an under pair or a straight draw with something like AJ, AQ, or JQ, I would have fired another barrel on the turn as he,s most likely going to call u down all the way to river. If he has a K, I expect him to open with a raise. If he check raises, you pretty much have a good idea that u may be behind

This is an easy fold regardless of the tourney buy in amount. It makes no sense to risk your stack with AQo at 10/20 level even if put him on air or you know your ahead of his range. AQo doesnt play well post flop against his range, and he may very well show up with KK or AK with an all in 4 bet. I dont buy into the idea that it's just a 2 dollar tourney and if u lose, just load another. There will definitely be better spots ahead to get your chips in against him.