Stay away until the regionals start offering $20K/year more than their current payscales or pay for training. Actually both.

Given that he all ready was previously a 121 Captain, my bet is that he finishes training, starts getting interview calls from majors within 2-6 months of being on the line, and is gone to greener pastures (e.g. a job at a legacy) within a year of starting back at a regional.

As you said, jB requires the 300-hour lookback, SWA requires 2 years of active flying in the previous 5 years, but pretty much none of the others have codified lookback/recency requirements.

If a "quick upgrade" regional like PSA or Compass is convenient to where you live, that could help you if you don't yet have the golden-1000-hours, as well as soften the financial burden for that time, too.

The "quick upgrade" at PSA and Compass is for those with 1000 hours of 121 time or close. The "quick upgrade" will not come to those with 0 hours since a lot of pilots will upgrade below them, making their upgrade prospect worse.

From the OP:

If you have an ATP it won't cost much to get current. The majors will want you to get up to speed at a regional since a lot has changed operationally and in the aerospace system, etc. Then you will be competitive again. You're in a better position than you think. Don't do anything to compromise your finances, there's no need.

It would seem your blinding hatred for all things PSA has made you bring us up needlessly again. Didn't you already start an entire thread to spread your misinformation?

There is no misinformation with the fact PSA 50 seat aircraft and other 50 seat aircraft elsewhere will be parked much sooner than planned.

Your hatred and other's with the fact, is very telling.

Yes, it wont be "quick" it will be instant. Just be captain ready when you start class.

If you have 0 121 time, you can't upgrade. It will only be "quick" for those with 1000 hours of 121 time. Meaning those with 0 121 time are looking at a much longer upgrade time as those junior to them upgrade over them.

It will be quick for 0 121 and same day for prior 121.