I know this is a moot point now in regard to the job that the original poster was bidding, but I can't help but comment.
Many of the folks contributing put forth their ideas in relation to the criteria in each of their areas, and then listened to the other posters and considered varying regional differences. Others did the same, with the exception of factoring in any of these variables, or scale of economy.
It is great to be the most efficient time wise so that one can hurry and get on with the next project, unless of course the next project may not start until next week. The original poster was renting all the equipment for the project, which most likely means that he is starting out and does not yet have more work than he can handle. The most important aspect to him would be to do an excellent job while hopefully making some money so as to begin to build his reputation, and learning from the process.
An area where good aggregate is plentiful, and dumping areas are as well, will certainly change the equations from an urban area where real estate is valued much higher due to supply and demand.
A large company may haul the concrete back to their own yard, crush it and resell it. A one man operation just starting out certainly cannot do that, so it doesn't even enter into the equation. The cost of crushing the concrete may not be viable in some areas, but may be the key to profit in others. Bringing in a track crusher, crushing the concrete and then selling to a project a block away may make the most sense, assuming you have another project a block away.
I suspect that some could take a week to do this project and make money, while others would loose if it weren't done in a day.
Just because something makes perfect sense in Boston doesn't mean it makes any sense in Miami, or Lubbock, or Olathe, or Seattle, or Melbourne, or Tel Aviv, or Paris (Idaho)!
I have bloviated enough, cheers!