On-Site Antminer S19 Technician

I run a small bitcoin-mining facility in Rosenberg, Texas and several of my Antminer S19 units have gone down. I need someone local to the Sugar Land / Rosenberg area who can drive to the site, pull the bad rigs, and drop in spares so hash-rate loss is kept to a minimum... (Budget: $30 - $250 USD, Jobs: Apache, Bitcoin, Circuit Design, Electrical Engineering, Linux, Local Job, Microcontroller, PHP, Troubleshooting)