As mentioned, many of these alternative projects have been done more for fun than for profit, and the ones for profit have ranged from a few hours of work to a couple of months. Thus, pricing really depends on project complexity.
So what I guess I'm trying to say is sorry for wasting your time if you were hoping for numbers here.
However, if you're interested in working together on an alternative project, I'd love to discuss possibilities. The process is pretty simple.
For further discussion and explanation, please contact me with detail or inquiry and I'd be happy to discuss any possible options.