It sounds interesting as i have seen many great shipping container stores and 'store / food parks' (UK).
At a high level the few things that pop to my mind are:

- Locations (ie: traffic that fit brand demo): your ability to offer interesting locations with on brand traffic will be a driver to your success (aside from brands using it for their own locations)

- Quality: show and make sure you can execute 'on brand' 'wow' 'cool' build outs. make sure that they feel fresh (vs used) for each successive customer

- Business Model: Do a high level spreadsheet as It's likely it could be a lower margin business (rental, booth etc) which is not an issue, but you need to decide if that is what you are after to commit to for your journey (or how to change the model).

I met the founder of BoxPark back when they were just getting started and loved the concept: https://www.boxpark.co.uk/