I imagined this idea would be integrated into a traditional education, but students would do these projects multiple times, allowing them to gain a variety of experiences as they decide what it is they would like to do as a career.
After completion, students could do what they would like with the project. That could mean creating a small business, selling their idea, or even abandoning it. A group of students may even complete another project together that stems from the prior project. This would depend of course on the type of project that was done, as well as the outcome, since not all projects will have a successful end product.