Ill indulge you. Drones monitoring every 100 miles or do and notifying border patrol if movement is detected. Border patrol offices every 300 miles. Cameras every 100 miles also with live monitoring. Electronic monitoring along the entire border. Motion detection.
That would be a start.
edit: this is a good article on a "SMART" wall. Which has garnered bi-partisan support.
The “smarter” wall: How drones, sensors, and AI are patrolling the border - Vox
You are suggesting stuff that is already in play where the budget allows. Also, the "if movement is detected" and "motion" detection is pointless, unless you have a way to eliminate wildlife, the weather, vegetation (trees blowing in the wind), etc. You would be spending most of your time on a proverbial wild goose chases, looking for something that doesn't exist. (looking for a person, when it was caused by an animal or the weather) Hell, ask anyone with motion detection security cameras, how often they go off because of a stray cat or dog, ore even the wind causing a tree to move to much. (yes there is technology to indicate when it's a person.. but do you seriously believe it would be hard to fool that technology?) You also seem to be ignoring the costs as well. Are you aware that it costs over $12,000 an hour to operate a Drone, not to mention the Millions each drone costs? (smaller drones are coming into play, helping reduce costs). The costs are discussed in the very article you linked as well as other factors.. yet you didn't stop and do the math.. I am not even sure you read the full article. 1 single drone, flying around 24 hours a day monitoring a the boarder would cost over $288,000 per day, or $105 Million + a year... We already spend over $4.8 Billion per year on boarder security (yet you claim we don't secure our boarders). How much more do you believe should be spent? Where will that money come from?
What you fail to realize, is you can have every possible boarder security measure in place, and it will still never be enough. Because all any security measure does, be it a security system on your car/house, or boarder security, is to keep honest people honest. Those that truly want to get in your house, car, or in our countries thru our boarders, will succeed no matter what security measures you put in place, because every security measure has a way it can be circumvented. The real people you should be worried about, the actual dangerous people, the real criminals, no security measure will stop them. Yet, you spend your time worried about the people trying to make a better life for themselves, screaming we don't have boarder security, when we do.
Anyhow, that's enough about this OT discussion where it doesn't belong.