Unfortunately I've seen these terrible delays with our own clients and there's little that can be done other than what you suggest: get to the U.S. on some type of work visa and then pursue the green card when here, which is a very fast process. But one correction: you are allowed to travel to the U.S. as a visitor while your green card application is pending; you just need to maintain a home abroad and not work when here. We've had spouses in the same situation spend months and months in the U.S. while waiting for the green card process to run its course.