You also need to think about all the capital equipment that you require - things like EPOS systems, display chillers, hot food display, soft drink displays etc. Work with a good store fitter to design a nice, modern convenience outlet and you will have great success.
Budweiser cans should have a "Born On" date and it will advise you to consume within 6 months of that date.
Remember, beer will always taste best if nice and cold, that way it is really refreshing! Get yourself a good beer fridge and enjoy!