99% of illegals are lucky to own a good hammer.
George can afford a few for the caravans he is sending. Of course they make chainsaw like powered Concrete/steel saws as well which are not all that expensive. Then there is also Jaws of life that can be stolen from fire trucks and don't forget explosives are not that hard to come by especially by cartels that want to distract the popo.
Walls slow them down but what happens after they get through them is what counts.