Don't think you have to worry too much about accomodations that are too ritzy in San Pedro.
If you do a condo or the like it's a pretty Homey
type of place if it provides the fridge,microwave,coffee pot,etc.. I've stayed at Coconuts and Playador a couple of times and a number of places on the mainland and never considered them to be Ritzy. You'll enjoy the laid back nature of the island no matter where
you choose for lodging.
Have fun and relax.......Richard