We started with a 2 door and a 3 door reach in. Quickly had to buy a 3rd fridge (another 2 door) for BOH and regretted not starting with a walk in. Of course your decision will be predicated on your space availability and budget, but if you can make room for a walk in and its in the budget it makes sense. You can also grow into it. Also consider where you will put finished goods back stock.
A few items like bananas, ginger, apples (for a short time) and unripe avocados can stay out of cold storage but most needs to be refrigerated. Ask your produce supplier as well for best handling practices. Some items can attract fruit flies.