Check this site, you are still a year away so they wont be available but it does give you an example as to what you may be able to find:
Those low, low prices, check, they may be per night.
WARNING: most apartments in PR have no furniture and some don't even have a refrigerator or stove, typically electricity and water are not included, but some include water. So all of those are bills and expenses. Electricity is twice as much per KWH as in the states.
If you do find a job it is likely to be part time and pay is likely to be 7.25 an hour or less.