You could put that group (tongue in cheek) together for about $40 from Niagara.

The shifters are crap, I put some on a beater bike a few years back and it couldn't hold the tension from the rear derailleur unless I cranked it really tight but then it just became a single speed.

I put a sunrace freewheel on another bike, a bit weighty, but it worked ok.

No experience with the derailleurs, but they just look like steaming pantloads, urr, I mean they look cheaper than Shimano Tourney's.