When you start your game, as you've probably already seen you'll owe a large sum of money. When you pay off that mortgage, you'll be surprised to see a much bigger mortgage to pay off! There's a total of 6 upgrades to your home (and 7 mortgages), each one making your home substantially larger. If you're in need of money, check out our money guide here.
Below are the mortage amounts for each upgrade: