tom nook upgrades

To get nook"n"go you have to spend 25,000 bells in store
To get nook way you have to spend 90,000 bells
To get Nookingtons (final upgrade) you invite a friend to your town... when they buy furnitcher from your shop a couple of days after he will expand to a shop where he has 4 workers. Timmy and tommy work on the second floor with all the furnitcher and wallpaper, Harriet who works in the hair dressers on the hair dressers on the 1st floor and tom nook him self