Alligator
The Alligator-class Assault Ship was inspired by the repurposed ferries once used to capture Royalist bunkers and factories, albeit purpose-built to handle a more dangerous battlefield. It is at its best attacking fortifications, where its breaching/demolition saw is most effective. Moreover, what the saw starts, the full platoon of air marines will surely finish.
Cost: $1997
Maintenance: $36
Ceiling: 127 m
Speed: 100 kph
Command: 7 seconds