i have a 2 axle trailer.. and its a good length, i can easily fit two fourwheelers back to back. i put 1 ton of metal on it with no problems. 15 ft +? and the outside of the trailer is wood sadly. and im pretty sure its 100% free to dump this stuff at my dump but ill check and make sure. im going to talk to her after she gets out of work and try and work out a good price to do it