I have seen a few places try and open with the casual dining and “fast food” options working side by side and not a one has lastes very long. It ends up with them dumping one of the two ideas and trying too survive. They just don’t do well after a shakeup in their plan. I think you need to decide what type of food you want to serve and base the entire plan as a whole off of that idea. It will take a lot of the headaches off you and give you a better chance at surviving. Best of luck.