Just found this site today, its really good!
Anyway I am in Florida training at the moment with Delta. There are three Irish guys here in total. We all did our CAA PPL here last summer and did the ground school in conjunction with the flying. If it had not been for four hurricanes we would have completed the PPL in 4 weeks thats including the groundschool, but with those delays it took 6 weeks.
The groundschool is not difficult and I found it easier to do while I was flying because I was practising the things I was reading about everyday. They are not that difficult I would think that after 10 days study of 2-3 hours a day you would be fine.
My advise to you would be to grill the groundschool that you are thinking about going to, some even offer to pay for a tour, because i know that after coming here we all incurred a lot of hidden expenses. Also with the TSA visas are becoming more difficult to come by, as far as I am aware they have stopped the J1 and you can only get an M1. this would mean that you could not teach as an instructor, just incase that is one of the points they are selling you.
When I came here I was a little wet behind the ears and we only found that there were alternative ways of training when it was too late. Everybody thinks that the US is much cheaper to train. For plane hire and fuel they are correct but there are so many extra costs!!!!
If I had my time back I would do my PPL in Ireland, either go to a top school in the UK (bristol) for the ATPL's or even better if you're diciplined enough distance learn. Check out www.bristol.gs
I would only come to the US for my hour building and Multi CPL (that's where you make the saving)and then do the IR in England or Ireland
Its just an opinion take it as you will but I wish somebody told me this before I came. Hope it was of some help and good luck