How long would it take for a full time instructor at Aerosim to get from 300 or so hours to ATP mins?

I'm getting my four-year degree in ATC from a lesser known 141 university next May and I have my private. I wanted to fly but I got sucked in to the ATC program when I applied (guaranteed job, six figures in a few years etc.) but currently thats a bunch of BS and now it could be years to get in the FAA. Also any other schools similar to Aerosim anyone would recommend for knocking out ratings and building time at? Getting to the airlines would be my goal.