Well done. :) I'm going to have to display your work at my station on the Cake Build server. :)
Also, the cargo containers, at least if you've not modified them, have thrust and power. If you set the "Inherit thrust..." option, the cargo ship and containers should give your little brick enough thrust to move.
I'm glad to hear you are going to display it.
I damaged bottom of the container but the damage didn't cripple it so much.