I'll give you some bells. towns are the same size and you cannot make them bigger, but the shape is different on each gamecard. (or if you restart) House sizes... hmm... there are 6 I belive. 2 upgrades to your first room, then a second floor then 3 other rooms on the sides of your house. There a 4 expansions to Tom nooks store, they expand once you do something, like buy a certain amount of items, but to get the last and best store, I know you have to have someone over wifi buy from your store. (which I could help you with, but could I also ask you to buy from my store? I restarted and it's the last thing I need. Thanks!)
That should about do it. :p look on my pro for my animal crossing
FC. I'll do the same for you, contact me when you are ready. ;)