Create A 4G Proxy Server / That Makes Proxies With My Dongles / SIM on Linux

I am tired of paying for Proxidize. Please look at this site. I want to create 4G proxies using my SIM card / USB. These are for reselling purposes. I want the threads to be unlimited. Make sure speed is fast. Load balancing. User:Pass or Auth possibly even a dashboard. Please look at the product I want to base this script on https://proxidize.com/