Cam does MATH about this.

Bout the same as his Earth.

He designs the netting - several layers of it - with this in mind.

Isaac, who had returned to the rug by the wall with his ginger and tea to read and occasionally cough, flops down on his back (though with his knees still up and one foot tapping) and throws his arms across his eyes.

The drones, as they finish mapping, trickle back to perch on the shuttle barnacle-style and draw charge from it for any future mapping they may be called upon to do. "Hey Isaac, how about you come aboard while I figure out an elevator situation?" he calls out of the shuttle. "Wouldn't want to lose track of you. And then you can watch it all go up."

" - Yes please!"  He deposits his reading material in the low case in a reverent scramble and sprints to the shuttle.

Cam pilots them all out of the mouth of the cave, takes more rock samples to figure out where to anchor things, CAD's a many-giant-car elevator arrangement from the edge of the world on down, massages throughput numbers.

There are a few really large hunks of the softer rock he'll have to work around along an otherwise optimal placement.  Isaac's coughing upgrades to hacking for a bit post-sprint.  " - Sorry - "

"I'm not blaming you for coughing, dude, I just wish my medical knowledge weren't basically useless!" Plot plot plot.

" - Okay."  Once he gets his breathing under control he sits in unobtrusive quiet.

Elevator: go.

Isaac bounces a little as it goes up, and goes to raise his hand vaguely in Felicity's direction before pausing, again clasping his hands behind his back, and returning to watching the construction.

Felicity pats him on the shoulder and on the back with both of her left arms simultaneously.

And mutters a sentence which she doesn't interrupt Cam to translate.

"Okay," he replies, which also does not get translated though it's recognizable from the times he's said it before.

Elevator is up! Cam hovers the shuttle and flaps out to push some buttons and run it through safety checks.

" - You have WINGS???‽‽!!!"

Cam is already a bit too far away to easily hear the original pronouncement, but he laughs at the translation! He waves, perching on a maintenance platform to see how the pitons staking the elevators to the wall are holding up.

They seem to be doing pretty well!

Oh good. He checks them all, loads up the elevators with test loads of something that'll melt without leaving weird residue and isn't magical in this universe, sets all the elevators on test runs.

They carry their cargo in the manner expected.

Awesome.

He rides one himself for a bit to make sure it's comfortable, and then lets himself out - the doors are very locked during the ride, but he has the chip that's coded to the whole thing - and closes the door behind him and swoops back into the shuttle.

"You have wings!!!" Isaac giggles again.

"I do! Some of Felicity do too." He folds them up again. "But only I have a tail." Swish. He pilots the shuttle back to the cave, lets Isaac and Felicity out, and takes off again to build a city over his chalk marks.