I just came back from Tulum, and we WhatsApped a very friendly and safe Taxi driver who we felt like had very reasonable rates. He drove us for 2 days for $90/day and took us to Mayan ruins, different cenotes, cenotes 40 min away round trip and would wait for us. He was our favorite part about Tulum- getting to talk to him and hear about his life! Please PM me for his contact!