You have received a lot of advice. Here is my $.02
As said and seems like you have done. Find out the rules and regulations for what you decide to do. Stay current with them if this will be an over time planning to execution and after you open. Pad your budget heavily for unexpected costs. My wife owns and operates a business and has been in her building for over 12 years. She had 1 inspector change and it had caused her all kinds of headaches. Some could have been avoided if she had just stayed on top of the regulations a bit more, most are due to the inspector change.
Practice, practice, practice the bulk cooking and prepping..... A lot of your cook times are the same for bulk as they are for singles. But your product will react differently with all of the extra product. The biggest thing is bark and color as they cook. So you have to move the meat around to form these. The smoker will cook differently with the air flow change. Practice your recipes in small batches, but after you get the flavor you want practice big batches.
Prep time and batch recipes: WOW that is a big thing. Most batch rub recipes will multiply without issue. But most sauce recipes will need tweaking a bit. Remember if a 1qt sauce batch simmers for 20 minutes a 5 gal batch may need 2 hours to get the same results. Again practice and take notes... Your prep times will be very long at first, but as you get better at it and you will get faster, or at least you should be pushing yourself to get faster and more efficient. Time is money!!!!! Good ways to practice and get your name out is to volunteer at church or school cook outs or other things like that.
Martin is on the money as far as reheating.... The state of Florida does not have any rules on how many times you can reheat an item. What does come into play is the quality of the product after reheating. So our company has a 1 time only reheat. After that it is sent to a food bank after proper chilling down. Every time you heat and chill the product it changes the quality of the product. Thing like flavor, texture and color are only a few things, but the big thing is every time you cook, chill, reheat, chill, reheat..... and so on. You are running a risk of bacteria growth each time you go through the temperature danger zone (40-140F)..