I will take you at face value and assume that you aren't someone who signed up to troll and be disruptive.
I presume you are speaking about the money he "promised" from the military fund, the asset forfeiture fund, and last of all, the Emergency fund (all separate from the $1.375 billion included in the budget?
You do know that he plans to take that money in stages except for the budgeted money? That is, he will use the $1.375 billion to build as much as he can, then he will begin to tap into the money sources if it is needed.
The key to this is (I operate on the assumption that you do indeed wish to hear this, and aren't just a newly enrolled troll or leftist) is that no lawsuits can be filed by the Left until those other sources are tapped into.
Furthermore, this contentious process has the salutory effect of bringing the cost down as vendors scramble to bid on the available funds (Company offers to build 234 miles of border wall for $1.4 billion)
Does that answer your question? I presume you really did want to know "what the hell" he is doing.
Ok thanks.