"Constructed" may also be a misnomer..., The way I see it, it may have been "Assembled" in 19 days, but the building had to start long before that, as construction began off-site with all the panels and parts being engineered so that they could be assembled on-site.

No mention of the length of time for that process.
Pretty sure everything wasn't manufactured on site.
I see a very large meccano/lego set being assembled.

Wait... Did he say $40 Million Airship?
$40M for a balloon, some aluminum toothpicks and 4 helicopters from the junkyard?

And they couldn't bother to think through making it structurally sound?

There is no excuse for a project this expensive to not have some proper design put into the Meccano-set they used to create the under-body with! Common, every one of us could see how flimsy that thing was from the start!

I'm not at all convinced that what we are seeing here are the convection currents that normally drive a lava lamp, rather I think it more likely that we're seeing eddy currents created by a badly balanced centrifuge which results in uneven acceleration inside the lava lamp bottle.

Still, huge upvote for making a Meccano centrifuge in the dining room.