Please rerolls light.
Also, who chooses building location? Can the HVT leave the building and/or can 1 of my mechs pick him up?
Currently Daylight, 3 rerolls remaining.
And the building is placed on the map by the scenario. From what I think is going on, this is INTENDED to be a "defend the building" sort of scenario, but one where you can actually defend the building instead of having it sniped (as an immobile target) from all the way across the map. When I boot up the scenario, there's no option for the HVT being an on-board figure, so consider this as a sort of "mission timer". Since the HVT doesn't appear on the board, no, you can't evac him out of the building. Note that since the HVT doesn't appear as an on-board figure, that means you can fire into the building to take out enemy infantry (though I presume that if you collapse the building, he still dies).
Basically, this is a scenario that is prone to being over-thought, and is vulnerable to a lot of "why can't I...?" Take it more or less as presented, because that's a rabbit hole that doesn't have a bottom. ("If I know about the scenario ahead of time, why can't I just evac the HVT the day before and automatically win?", etc)
A word of advice? If you're worried about getting near enough to the building in time to defend it, consider that the map size and terrain are all re-rollable. This is also a good reason to have anti-infantry weapons available on your Mechs; the OPFOR infantry will be exposed between the time they land, disembark, and move to the building to enter it.