Looking to release an open-source SDK, all of which uses novel code OR dependencies that are MIT/Apache.
For the business model, I would like to sell commercial-use licenses for use with the SDK, allowing people to use the library in their for-profit applications. Simultaneously, I would like there to be a free non-commercial use copyleft license (i.e., GPL) that allows people to build free, open-source software using the SDK.
What is a proper license that will work for this arrangement? Looking specifically for a commercial SDK license, since GPL is easy to find.