Hey Bayside,
I would go the bobcat/truck combo.
A 4m skip is around $200 give or take but you will spend half your day loading that. Haven't hired a bobcat for awhile but it would take them about 20min and you can have the ground levelled too. I reckon their about $60-80/hr but you have to factor in travel/dumping then returning and loading the bobcat so I think close to the same price but no work on your part. (The guys I know usually check the papers for places that want clean fill so its free, otherwise they may have to hit you with dump fees, don't know about commercial rates but I can dump 1 tonne at the concrete tip for $10, at a normal tip its $86)
Chris