Buying land, building a villa, and renting it in Tulum

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A friend-of-a-friend recently purchased land in La Veleta, Tulum and built a 6-bedroom villa with a pool for under $200k. She now rents out the entire place for approximately $500/ night (slightly higher during holidays and the high season). The property is approximately 600 sq meters and 3 miles from the ocean in a gentrifying neighborhood. A car is needed to get to the beach. 

Although she hasn't formally marketed her place, it's booked out 50%-75% of the time through Airbnb.

I'm interested in doing the same, and would appreciate advice on land acquisition and the building process.

Thank you in advance,

Christina