True, however, we have to start somewhere and as crazy as it sounds...building a bigger, better wall would be easier to do and would discourage many if they knew they couldn't simply walk across.
In his 2nd term, Trump can go after the myriad of taxpayer paid "stuff" they get in addition to a progression of heavy fines on employers who hire foreign nationals here illegally.
The wall might discourage some, but ultimately, it will not stop them. The rewards for getting onto U.S. soil are just too great for any physical barrier to permanently deter them.
Turning off the freebie faucet is actually easier than funding and building the wall. That should have been Trump's campaign promise - not the wall.