I am fully aware of the world and setting we are playing in. As for the Taurox. I am also aware of it's existence. I am simply going off a mixture of the lore, sense and rules. Where if a Valkyrie can carry twelve Guardsman. And one space marine takes up 'at least' twice as much space as a regular human. And a terminator or Assualt marine takes up twice as much as them. We have already basically filled any Valkyrie or vendetta craft. Throw in the minatour and goo luck even finding a square foot to stand on much less a seat. 

I am not about to completely abandon logic. Some leeway must be given admittedly. But not completely. I refuse to do that in any game. As long as lore is established I will move to follow it. If that is not a plan for the rp well I guess I should probably bugger off because I will not enjoy myself if that is the case. 

As for the Taurox I am unaware just how big they give actual specs for. But I imagine it's troop hold it taller and probably just as long as the Valkyrie (assuming a realistic size somparison to the holds.) who has to retain some slim profile for the sake of fuel consumption and anti-targeting. Not going off of the size of the models. Or maybe the numbers are just seriously fucked. Either way. I am not going to make that character if I don't feel like it is 

A- plausible
Or B- Worthwhile.

And the Taruox would be less concerned than a flying vessel about the massive amounts of added weight from three superhumanly sized and armed people. Which would be an actual concern.