First the deck crew have to locate and get to the Savannah Master, then they need to remove all the equipment keeping it in place - be it cables, latches or whatnot, then they need to get it outside or to a position on the deck that they can power it up without a risk of FOD (I wouldn't want to power up a hovercraft in an enclosed space where there's lots of tools and random stuff lying around), and then complete checklists and prep it for operation. 2 minutes sounds pretty good, to be honest.
Let me come at this from a different angle. Is there anywhere, in any book, that says personnel cannot be in a Cargo Bay while the DropShip is in motion? If so, why? Just to clarify, I am not talking about when the ship is on a High-G burn, or is under attack, because
everybody on board should be strapped into something. I am talking about a cargo transport, making a smooth 1G burn, delivering a Command to a world where there is no immediate danger. There has to be a way to gain access to the cargo bays from inside the ship, because having the door controls on the outside where they can be damaged by reentry, debris, weapons fire, ect... just seems silly. Why, at any time during transit that it is possible, can I not send a few techs into the cargo bay with gripper gear, and environmental suits to do
basic prep work (since not all prep work requires the unit to be moved, or more equipment than a single person can carry), so the time it takes on ground is mitigated?
Though, to be honest, now that I think about it, if I have at least 12 techs to do prep work on the ground, and it is potentially taking more than two minutes to unload the next unit off the DropShip, I could just cycle through them one at a time.
I do think that there should be some sort of additional modifiers for prep time based on weight, and components (engine type, amount of ammunition). It just does not seem right that 12 techs can ready a Behemoth Heavy Tank, or a Savannah Master in the same time frame. How do 12 people even work on something so small at the same time?