Solution to my tc and motorcycles problem

For the past 7 months I have carried a honda motorcycle on a custom made rack mounted to the rear hitch. That was fine for one motorcycle, now we have two. Mainly so I can go my way and the wife can go hers without having to unload the tc. After looking and pricing a bunch of different options I settled on a used but in great condition triton 8.5'w x 12'l aluminum flatbed trailer. I removed the salt shield tonight and ordered 5 sheets of bright tread plate aluminum to make a 8' wide x 4' deep x 40" tall box that my wife will tig weld together for me. This should give a huge enclosed and lockable area for that extra stuff plus leave me with 8' of deck space leftover for the motorcycles. We have covers already for the motorcycles and i plan to make those new style locking tire chocks to simplify loading. This trailer has a 2200 pound cap. so the two motorcycles weigh less than 600 pounds combined leaving me with about 600 pound of stuff for the box. And I can pickup the trailer by hand so it is less than 600 pounds so I should be nowhere near cap. I sure hope it works but it still disgust me to have to trailer anything. I loved being just one unit and going anywhere.