Thanks for you answer
I'm not really sure to understand your question....
I try to come and work in US and I've been in contact with many many DZ, but first question it's always, are you legal to work in US ?
So if your question is : how many DZ are looking for full time instructor, my answer is : A LOT
If your question mean, do you know what it cost to a DZ to employ a no-US resident, my answer is : NO...
I'm really trying to know WHY they are not ok ton sponsor peoples so if it cost money, now I understand...
I really looking forward to find a solution to get a work permit and come to US, so if you get any advice or idea let me know