If you are just looking to pick up enough greens for compost you might look for a leaf sweeper that goes behind a lawn tractor. I finally slipped one past my wife this fall. It cost $280 here is Alaska, but has a 17 cu. ft. basket. In just a half hour she has more than enough greens for her compost. And we have LOTS of compost. I have a 42 inch wide unit, but have seen 60 inch units advertised. You could even pull it behind your mower unit.
What I like about the unit is that I dump the material at the pile and then come back with my tractor and toss the pile. No more turning compost every week by hand.