Trump is a real estate developer. It is impossible he doesn’t understand progress payments on construction projects.
My prediction: he will insist that Dreamer processing track wall completion, e.g. when 10% of The Wall is physically complete and operational, then 10% of Dreamers can have their paperwork processed. No wall, no money for Dreamer paperwork. Then it would become a matter of budget vigilance every year.
This is his ace in the hole. Otherwise, a wall bill is just another authorization bill with no incentive for Dems to actually fund it.
The Israelis traded land for peace - it predictably failed. Trump knows better than to trade something tangible and immediate (Dreamer legalization) for a promise of future performance (wall funding).
I believe that if Trump called for VOLUNTEERS with construction experience to build the wall that he would get an overwhelming response.
Give them a place to park their RV’s & Travel Trailers at ‘base camps. Get volunteers to cook & feed them in tents-—for free- and bring in trailers for showers & laundry.
The WALL could be built in months-—not years.