Nobody's gonna convince me a wall that meets the security requirements outlined months ago, and incorporating hundreds of miles of solar panels, is going to cost less than a traditional wall -- let alone only a tenth as much.

It might very well end up paying for itself eventually, but don't the contractors have to be paid for their work at the time it's completed?  Oh wait, I forgot that Drumpf has a long history of stiffing his contractors.  Why would this be any different.

And once the wall is built, how is all this power going to get into the grid?  The wall would run through some of the most desolate territory in North America.  A passive wall is a difficult enough proposition.  Add solar panels and the infrastructure to deliver power to the grid, and we're talking a much more challenging project.

Drumpf, with his lies and grandiosity, repeatedly glosses over the critical details of things he proposes.  This is certainly no exception.