Seems he may have found someone else, or got tired of all the questions, and concerns on your part. Recruiters are above all else pretty lazy people, and they see foreigners as a means to an end. To him you are just walking talking cash. You'd think you'd be treated better, that being the case. Sadly it is not.

Anyhow, they have little patience for questions, and if you ask what they consider "too many" they will just stop talking with you, which is just fine I say.

If you are traveling 10,000 miles to some unknown dust bowl to teach, I personally think tons of question are in order, and appropriate. If anyone has a problem with this, don't deal with them, working for someone like that would be a nightmare. Oh and don't ever work for a recruiter, believe I said that before, but you can't say it enough.