1) Your apartment gets trashed. They break your walls, pour cement down your drain, break the furniture, etc?
2) Tenants refuse to move out. I'm sure there are all kinds of laws protecting them, and it's very hard to kick them out even if they aren't paying.
3) Somebody gets injured on your property (slips in the bathroom and breaks an arm), and sues you for a shitload of money.
Also, you forgot amortization in your calculations. Things will wear and tear.
1) Your apartment gets trashed. They break your walls, pour cement down your drain, break the furniture, etc?
2) Tenants refuse to move out. I'm sure there are all kinds of laws protecting them, and it's very hard to kick them out even if they aren't paying.
3) Somebody gets injured on your property (slips in the bathroom and breaks an arm), and sues you for a shitload of money.
Also, you forgot amortization in your calculations. Things will wear and tear.