Rick,
Sorry to hear about your breakdown! If you don't mind could you let us know how much it would be to have it towed back to your home base.
Not trying to encourage you to do that or not, but I have often been interested in the cost of bringing a rig home several hundred or thousand miles. I live on the east coast,NC, and I could probably get a better price on fixing my coach here than in other parts of the country.
When my wife retires I/we hope to explore the western states and I know that a engine replacement is one of the possibilities for my coach. It may not make financial since, but it will keep the coach going and we have already addressed most of its other issues.
I hope you somehow get some better news, or a better price. Good luck!