You can pay for 3 days and parking is near

Leaving the cross border room is the parking lot, similar to the design of any commercial plaza. The crossing pays per person no matter how many days you are going to be in Mexico or the United States

Sii you have to have your boarding pass, to be able to cross and pay 16 dlls

You need your printed boarding pass to be able to cross, you pay and the parking lot is outside when you leave San Isidro, from Mexico to USA.

You pay to cross and the parking lot is very close