I like your answer best. And send the bill to Mexico for the costs of his incarceration and a “rental” fee for the trebuchet. let them know it’ll be getting additional use in the future for which they’ll also be billed.
We don’t have to get money from Mexico for this. Seizure of property and assets will pay for it, plus we are going to charge $25 a turn for a chance to pull the lever on the trebuchet.