Couple more thoughts.
I am totally on the side of successful border security . I also think it is not a question of money. I do think it is a question of money effectively spent.
First the wall. Even if it is funded and they move forward building it, construction will take years. They have already built 600 miles of the easiest portion. The river between Texas and Mexico is not a pretty line on paper. It is full of steep bluffs, canyons, arroyos draining in and generally hostile and very remote countryside. . There will be untold litigation between landowners that resent having their property stolen by the govt. that delay the process.{ These same landowners know how and where to stop the problem and know the wall is a joke} And no matter, even with the wall it will take a significant increase in manpower to assure any positive results. Why not just add the manpower now placed where they know to intercept crossings and connections? Hell, I know where standard crossing are that have been in place for years and I'm just a red neck from La.
There is a difference between wet backs seeking employment in U.S and drug smuggling. Certainly some wet backs smuggle a garbage bag of whatever across the border where they are met on the other side by transportation on a public road. { Cheapest easiest to stop it there } But large scale smuggling comes across a) Standard border crossings everyone else uses via mules in cars, specially equipped 18 wheelers, trains etc. b) Via well developed tunnels that are all along the entirety of the border c) planes, submarines and things we haven't figured out yet. Do we really think Chapo Guzman was worth $16 Billion by having a wet back sneak across the river with garbage bags? And he's just one. Drug smugglers use different tactics than illegal aliens seeking employment.
Almost all illegal immigration in the u.s is met by transportation on the u.s side of the border. That is the obvious, cheapest place to disrupt the process. It is well known where and by whom this happens. Someone please tell me why that cant happen starting today easily and effectively? I also propose the wall will be grossly ineffective and still require manpower to be successful and that manpower could be employed today with great success utilizing knowledge already in place. I see the wall as an expensive metaphor.