a 300 acrylic is really light as a 264 glass you need 4 guys to be safe and I don't mean boys..... we were all over 240.... we only had 3 of us but we really wanted a 4th guy.
no way, salt water fish are so beautiful, i wouldnt mind having one that size dedicated to just saltwater, I moved a 350 gallon wooden tank into the room, didnt weight too much, which was pretty surprising