The salt in the sand on a beach will kill an electric motor! The answer to all your questions is the same given to all newcomers. ......Find an instructor!.......... Manitaining and flying R/C model planes is complex and hard to do on your own. Yes folks do it but it costs them lots of money in crashes . Most give up! Find a local club and join it . They will teach you a lot. Do not buy a plane first! Get an instructor first. He will guide you to the proper plane. Usually you should start with $500 but there are small electric planes out there for $150 or so. Once you learn to fly one of these and you want to move up to a better plane you have to throw away the first one and all it's equipment and buy the $500 equipment and get instruction!