About 3 hours in and have just moved to a new table, 4/8 of the table have 100k+ stacks and i have played with most of them before and seems like a loose table.

Average stacks at this time is 45k with Hero sitting with a nice 80k stack. Blinds are 500/1000 with a 100 ante.

UTG(0+2+3) and Button limps. Hero in on SB with 3s4s and makes the call with the BB checking behind. Pot is 6,900 at this point.

Flop is: 3h,4h,Kh

I make a questionable check 1st to act but see the table as loose so plan a check-raise.

UTG2 makes it 5k to play, UTG3 flats: Both have me covered and i make it 20k. My plan is any Ah,2-5x will shove as they tend to overplay hands from previous experience. UTG2 folds and UTG3 shoves, i tank and he makes the statement: "i guess im ahead then" at which point i call. He turns over Jh5h and wins the pot.

Looking back i don't like flat calling in my spot but a raise to 13k with the intention to folding to any raise is a valid line, but is which line is better 13k and fold to raise/shove or making it 20k and calling most shoves from players overplaying hands? Also i didnt think UTG3 would flat with a Jack high flush which is vulnerable which lead me to think Ah,2-5. Anything wrong with my line/though process?

i wouldnt get it in with with bottom 2 in this spot...people could have K3 or K4 and then its mostly a race if they have one heart....dont race with 80 BB's and an above average stack imo

so what line would u take given the action?

i like betting 4k and folding to a raise any hand that raises us will either have up crushed or be about flipping with us i dont want to put too many chips in the pot in this spot especially multiway.

thx for the comments i feel i majory misplayed the had and instead of being tricky, should have simply bet/folded flop.

*hand

Totally agree with that.
Anytime I face a limped flop with a possible flush with 3+ people, I am very cautious of not putting any more money unless I've got the nuts. The flush is always very likely in these spots.
It's nitty nit but you must be a hell of a good reader to know you are ahead, by betting in a small stakes live MTT you will either make everybody fold or get raised by the nuts, unless you have them.