Krenko is the fastest way to achieve that admirable goal
Preventing a variety of creatures from blocking is a cute tack-on, but what you want to be doing shortly after you cast a huge card is stabilizing, not immediately start racing
It gives the deck some much-needed reach and card advantage that it was lacking, and even if you dont build Goblins, Zurgo is a great token commander
White provides some huge support cards for a Vehicles deck such as the best mass Vehicle recursion in the format with Brilliant Restoration, unmatched protection with cards like Leonin Abunas and Bronze Guardian, along with some of the best Vehicles like Parhelion II
Which triggers are we copying, Myr Battlespheres ETB
At least five of the cards in their deck and sideboard had to come from each of the legal sets, and those legal sets included Homelands