Well, I should have said forget about FREE climbing that monster. You could get over with a cherry picker or construction crane as well. But the bottom line is that design effectively eliminates free climbing.
More than half of the people who fall from a height of thirty feet, will die from the impact. Those who survive, are not OK. Six feet up without a finger hold is a showstopper, as is a barrel top of that width. The USSOCOM commandos testing the prototypes found it very difficult to even get a grappling hook or weighted rope up over the top after very many attempts.
Only specialized teams using equipment will go over such an obstacle - Jose SixPack and his family will have to go elsewhere.
If that kind of barrier goes in, the Border Patrol in that sector will become lonely and bored like Maytag repairmen.
How far can a person cast a lure?
A weighted LINE that pulls a heavier rope over is quite easy to do.
Once the heavy thing is over; a few folks on the ground could pull another to the top quite quickly; I'd guess.