First, on 10k transports.. No. Simply, no. The current Adv. Train should be slower than it is right now even.. 10k cargo ships would seriously unbalance the game, and we don't need any more unbalances right now..
However I do like the unique trade ships idea.. Bretonia, Liberty, Rheinland, Kusari, and Zoners (for civilian) should all have 4,000-5,000 cargo ships of their own. Adv. Train would be civilian built by zoners. Kusari Transport (or whatever its called, not at home to check atm) is fine as is, except should need 4,200 cargo (if it doesn't already have such). Bretonia uses slower, but bigger ships, so they should have a 5,000 cargo transport that is big, and very very slow.. Easier to pirate, but it has high armor. Liberty should have a balanced transport. Mammoth could be remade a bit bigger with 4,500 cargo and less maneuverability. Rheinland would have one similar to Bretonia's, except with more firepower instead of armor.. So around Liberty's transport armor with 10 level 7 turrets. It would move a bit faster than the Bretonian one and have around 4,600 cargo. 400 less than Bretonias due to more space used for weaponry. Adv. Train would stay civilian, but the armor should be nerfed badly, very very badly.. And maneuverability decreased by a small bit. Zoner transport would be about the same as the Bretonian one, in keeping with Zoner's capital ship designs. High armor, firepower, and size with little agility. Except the transport should have minimal firepower. Basically identical to the Bretonian transport except in looks And it'd have 4,800 cargo.
I'll post again in here when I get home in a bit..