[bravura]

You could have other students do collaborative "grading" for certain assignments, much like students vote on which questions get asked.

For example, the assignment is to pick a method for reaching customers. I describe my business and propose five methods for reaching clients. To get feedback, I then have to vote on five other student's ideas about how they would reach clients.

Whichever method the students choose is the best for me, I have to do.

Students can also note which ideas for reaching clients seem particularly good or particularly poor. You can cull the top of these annotations to discuss the ones of broadest use for the class to understand.

I think the principles of your approach are simple enough (and that's a good thing) that for basic grading you could crowdsource it. It's not as good as being able to pick your brain, but it's still pretty good. You could then use the voting method to find the biggest wins and the most useful fail-cases to discuss in class.