25/25 NL holdem 9 handed min buy-in is 200bb, were playing live! the game is super juicy. where about 45 minutes in so everyones has loosened up a bit and the chips are moving around. the button straddles for $50 I'm in the small blind playing around 500 bb i call with Qh7h, big blind folds, UTG raises to $150 (he opens a crazy amount of hands and has a huge range), UTG+1 calls, MP calls,MP+1 calls, HJ calls, button just sat downed is still getting a feel for the table and is just flatting everything, he calls, and i call. Flop comes Qc3h5s i check UTG bets $400 UTG+1 folds, MP folds, MP+1 calls, HJ folds, I call. Turn comes Qs (Qc3h5sQs) i bet $1000, UTG calls MP+1 folds, River comes 6s (Qc3h5sQs6s),UTG is playing roughly 300bb, I check He bets $2000.
my original read i put him on an open ender which based of that i should have folded, it defiantly doesn't help either that runner spades came that defiantly in his floating range on the turn. But he's also doing this with a ton of his missed hands with were he makes some type of pair or two pair on the river that has some show down value and missed hands like 4d6d, he showed a few big bluffs with missed draws previously and is one of the most active players at the table getting involved in almost every pot and loves to gamble and opens and insanely wide rang of hands. i ended up calling and he showes 2s4s.

First did i price him in to much on the turn ? should i have bet more?
Second is that a simple fold on the river?