Like Harold pointed out this was the source of my confusion as well. You are not going to be able to sell something proprietary and then do the same thing somewhere else. I am only seeing 3 options here. 1. Sell it all and move on, you wont be able to do this business. 2. Get a new manager for that location and you and your team run all the locations. 3. Franchise.

I am not sure what your proprietary process is but if you sell you are out of business.