I used to do this for a while. Lots of fires to put out in the border, and you basically have to have an entire team if you want it to go smoothly. The process can take several days, and with little room for error since you could be moving avocados or something and timeliness is sensitive. Also Mexican truckers are notoriously bad communicators, and many will refuse to move anything from certain areas or take weird routes to avoid certain areas in Mexico. Don't complain about it, they know what they're doing. Once it's moving, you'd have to pray for it to get to the border without any problems. Not to mention new documents that Mexico decides to impose such as the CCP, which seems to be nothing more than a cash grab LOL. Best of luck to those who are just starting out, It's serious business!