How to reopen a dragstrip?

Never done it so I can't help you but if I was going to I would just google dragstrips and start calling some and let them know your intentions and that you are seeking advice. I'm sure you would eventually come across someone that would be willing to give you some guidance on the setup, legal ramifications and profitability margins necessary to be successful in the venture.

*** I wouldn't call a strip that's close to you as you would inevitably be viewed as competition.

*** I don't know if sanctioning would apply as you are in Mexico, however what applies here in the states will most likely be different down there. Probably be some pay offs involved ha ha ha !!!