@Richard *******************
yeah she's NOT gonna be able to go to lao cross over and come back over and over. :/ She (and you too) can make TWO 30 day visa exempt entries by land in a calendar year :O That's it.
That the school doesn't know what paperwork to give you so that your wife can get a Non-O visa based on you getting a Non-B visa raises flags for me.
Fly over for the interview, you both can get in on 30 day visa exempt entries, come here and get the interview.