Did you also not take math as well as English in school? Israel's wall is 150 miles long and ours is 2,000. Get out your calculator and do the subtraction in case it's too difficult for you to do the math in your head.
I would ask the same of you.
Nearly 700 Miles of Fencing at the US-Mexico Border Already Exist
If you do the math we only need to build another 1300 hundred miles of wall and there's many areas that need no wall so the USA can well afford the resources to build and support border protection.