According to RestaurantOwner.com – before you even open your doors. Looking down the road to the eventual sale of your business should occur during the earliest planning stages, and very particular attention should be paid to this eventuality when you are negotiating your lease.
Prospective buyers will typically be looking for a minimum of seven years, and will also want easy assignability of the lease to others, so pay close attention to these factors when you are looking to sign a lease. Selling your business can be a major source of profit for you, but only if you plan it out properly. So keep the end-game in mind from the very beginning.