I have around 300 hours with a private certificate over about 10 years of on and off flying. I am 29 and have decided to make flying a career. I am wondering how I should proceed to get the required 1500 hours in the quickest way possible...who knows how long this "shortage" is going to last.

Should I just go to my local FBO at Sarasota International ( KSRQ about 40 miles south of Tampa FL) , get my ratings there, and then CFI for them or should I go to one of these ATP type schools that advertise relationships with regionals'? Or can you easily mix and match or do schools typically want to only hire CFI's that they train?

I guess my main concern is getting the most hours in the shortest amount of time after my ratings are complete. I would probably need to investigate at the FBOs and find out how many hours their CFI's are getting a month? I don't know if a rating is a rating or if a regional sees that its from a accelerated school and would take that over a FBO trained pilot. Thanks for your advice.