A couple of thoughts in no particular order.
When planning the root cellar location, consider the route you will need to take to haul all you potatoes etc through the house. There is a reason many old cellars had an out side door.
If it was my house, I would want a much larger kitchen and a pantry that was at least 8x8ft. Depending how much food preservation, butchering etc you plan to do, you may want more counter space. Also, things like canner, large stock pots or a meat grinder take up a lot of storage space on a small kitchen.