Completing seems the better option to me, we'll be playing for flushes/straights/trips rather than TP so we don't mind if there are more people in as they're more likely to have dominated draws.

After completing I'd lead out flop for basically pot, basically pot turn and then bet river for value depending on who kept calling/stack sizes blah blah etc.

As played, definitely not folding. I think we get more value from mid and pocket pairs by betting though.