i had one of those cleanup jobs last dec/jan borrowed a bobcat and sat in it for almost two months straight. 172 tons later... my wife was out of maternity leave and i was back on kid duty. @20% i was making bank, had one of my local yards bring the roll off's and it was atleast 4 a day, they basicly dedicated a truck just to haul for me, and since they came out and looked at the jobsite to see what was going to come in they covered all the hauling. which free'd up alot of time for me to load and sort. i'd call them back and let them know that with the roll offs it would work for you to do a 70/30 split or a flat daily rate for you to be there.