Is the spinoff something that you would be "owner" of or is it something that your NP company would own? Who "owns" your code? Most companies retain copyright of applications developed by their employees (and contractors).
I'd be willing to offer any type of assistance.
My only experience is from 1984. I worked for a trade association (credit collection). The members of the association had a need for software. The association formed a for-profit division that did software development.