Are you located in a warm climate that the pool will be warm enough year round, would be the first question?
Do you have filtration, bio load figured out for the size of pool/pond?
Do you have grow out tanks or are you planning to stick with small monsters? Some of the possible inhabitants may have different growth rates which could be an issue if not introduced at proper times.
This sounds like a cool project and I am kind of jealous tbh. I live in Canada don’t think this could ever be an option for me. Lol