[Sasparilla]

...My bet is he will build it for a fraction of the cost...

And complete it earlier than estimated.

[GnuThere]

Then he gets to put up a sign like they do on roads:
“Under budget and ahead of schedule!”
The Left would love it.

[frog in a pot]

...My bet is he will build it for a fraction of the cost...
And complete it earlier than estimated.

He would more likely be able do that with a number of smaller contractors. Hopefully, the contractors would largely be from the border states; not sure there is a way to structure federal contracts to be awarded on a state basis to contractors of that state. (But there is always a work-around.)