First off ATP is crap, the "they don't hold your hand" translates to their instructors don't instruct worth crap.
I did my initial ATP at ATP, I held around 3,000tt at that time, ranging from CFIing to turboprops, been through a few schools and a few CFIs, ATP gave me the worst instruction I have ever received, basically the "CFI" is just a glorified seat warmer / safety pilot.
I've also heard if you're in their zero to hero CPL program, you don't get much, if any, solo time in their twins, it's all two student with one under the hood and the other acting as safety pilot, however you both pay full pop for the crappy trainer twin.
Like I said, I'd stay away from there.
Now onto you working in the US after you earn your CPL, it ain't going to happen, shy of you gaining US citizenship through marriage or something.
You might want to look into working in indo or Africa to build some hours after your CPL, there are some good threads on that subject on this site.
Blue skies