Buy everything. It is the best investment you will ever make.

You will not want to be limited in Jazz, you will want to mix it up and it will drive you crazy when you see "track not available."

Trust me, don't piece it together, buy the most you can with what you can afford as Herb said.

People are buying the stuff I have created with Band in a Box and it has paid for itself many times over.

Ditto the proper forum comment. Post this on off topic next time.

Welcome.