0.50/1 Non-nut flush play

[no1spec]

I think preflop is fine, 3 limpers ahead of you see a flop with the suited cards.
Flop, I wouldn't bet this with the preflop raiser next to act. Check this looking to raise BB when it comes back to you. If it was reraised I may just call as I don't want to nock anyone out.
Turn, this probably plays a little different based on flop, but I lead here. To much possiblity that it could get checked through. I reraise the turn.
River, that sucks. I'm probably to weak but I check/call. If it is two back to me I would wan't to fold but with buttons play I think he may have a set more than a flush. Not sure about BB, QQ with a spade? KK no spade? AA with A of spade?