Rent a house or stay in a hotel further down the beach toward the entrance of the Sian Ka'an biosphere. You sometimes can find cheaper prices since the accommodations are more of a trek from the main shopping and restaurant area of Tulum beach road (this usually applies to rentals rather than hotels), and it's significantly less busy in this area. We typically rent a home at the end of the beach road and take a quick cab, bike, or scooter ride up to dinner and shops if we want to. The bonus (in addition to potentially saving money) is that you're able to escape a ton of tourists, you get more of the beach to yourself, and, because Tulum is so small, you're still within walking distance of at least a few hotels and bars, so food and drinks are never far away.