Selling a master license can be a way to bring capital into the business.
1. Consider how much you can get at this early stage compared to its future value.
2. You will need to avoid the appearence of selling a franchise - since that requires greater documentation and specific regulations apply.
Look very very closely at the way the prep kitchen concept is rolling out over the USA and internationally. There are a lot of hungry mouths (I don’t believe that they are the customers) and a lot of free lessons to learn about the value propositions of new food ventures.
When valuing a licence oportunity realy think about whether you are selling a proven or untested concept. They will value quiet differently.
Also remember that the US franchising laws are very strict about when a licence is a franchise by another name. Really take the time with your legal team to understand just how the licensing and operating conditions you impose on the licencee not just the fees raised, will or will not drop you into the franchising basket.
If you can stay on the right side of the code you will not be on the receiving end of a very big nightmare.