You need to check with the bank on that. They may take the potential income in consideration when it comes to qualifying for a loan. Or they may want you to be able to fully qualify on your own income. Hard to say, PR banks have low trust levels and require a lot of paperwork.
As to 5 bedrooms, that is not very common in PR, there are some, but not that many.
Are you sure you want to Airbnb your own home and share it with strangers? Not concerned with your security?
Maybe you could consider a 2 floor house, full house downstairs and full house upstairs, nothing shared.