On the federal and state level in Brazil do the laws heavily favor landlords or tenants? For example, in New Jersey and California it can be hell being a landlord when you get tenants that decide they aren't going to pay rent. They could end up living in your house rent free for over a year while you flip all the bills. In a state like Florida it's easy to kick out deadbeat tenants.
I would specifically be looking to buy a lot of real estate in Santa Catarina if the laws heavily favored the landlords rights.