Cozumel Island, Mexico

Cozumel is an island in the Caribbean Sea off the eastern coast of Mexico's Yucatan Peninsula, opposite the Playa del Carmen, and close to the Yucatan Channel. It is a popular tourist cheap destination renowned for its scuba diving and snorkeling. It has great beaches, nice people, and safe streets. The main town on the island is San Miguel de Cozumel. You'll be able to rent a "Western level" 1-bdrm apartment in a great part of town for ~$300/month".