Welcome here.... lots of good info on making pizza on this site. For really deep and complete info, spend the time required to read 'philosophy of Neopolitan Pizza'. As for mobile pizza, there are a few in the area already. I'm learning it's a lot more work than what you see/read for the most part. Might still be viable, but the prep work and clean up never seem to be mentioned or given as much attention.
I'm from MN as well and am aware of the pizza chain you're speaking of... HOWEVER I don't think they are the best in the city. I still need to try Mozza Mia (although according to my daughter I really don't), but Pizzeria Lola has a nice ambience, and okay pizza.. still neither of those is tops in my book. You need to head to a (very) small single location place in NE Minneapolis for that! I will say that my wife and daughter had pizza the other day at the chain place and said they had the best tasting pizza ever.. so they might have changed their formula... only time will tell.