More like a trillion or more every year when all the costs of illegal,immigration are added up- both direct costs and indirect costs ie family of a slain breadwinner has to get therapy to deal with the issue, they lose time at work, they also had to pay lawyers fees, travel expenses to the trial, food lodging, etc a d various other costs associated with losing their loved one to an illegal
There were two,independent companies that did an estimate back a few decades ago, and they both concluded the real costs were in the neighborhood of $450 billion to $600 billion.
That figure is likely much much higher today given the massive increase of illegals pouring over the borders in recent years
One of the studies done is listed in my profile page if anyone wants to see the costs of illegal immigration broker down further.