I think you have to cool your heels off in your country of origin for a number of years, while waiting for your green card to be approved. It's obviously very traumatic for the spouse, let alone the children. I could see a divorce resulting from a repatriation. And for a Protestant preacher in English, I expect it would be doubly traumatic to be sent back to a Spanish-speaking country where the predominant religion is Catholicism. What's good enough for ordering food in a Spanish-themed restaurant or dealing with Hispanic day laborers isn't quite good enough for church sermons.