Hi Tony13. New here to reef2reef as well as the hobby, however, perhaps I can help you with your dilemma by sharing my experience with this. I live in Curacao, an island in the Caribbean, where collecting live rock is also not illegal. In the past I have setup nano tanks with live ocean water, live sand as well as live rock as the Caribbean sea is just 5-10 minutes away by car. My experience with live rock straight from the ocean is that it will definitely help your tank cycle. However, as all live rock, it will have to be cured because some of the organisms living on the rock in the ocean will not survive in your tank