Well, I'm back. And I have looked, and then stopped. What really paralyzed me was the fear that I might get a diesel bus, and have no idea where to take it if it breaks down. I'm no mechanic, and certainly could be fooled rather easily by any type of mechanical issues.
Ultimately, I was looking at a diesel over a gas one because I am hoping to avoid feeding the fossil fuel shell game. I am definitely not going to feel comfortable driving a bigger than van sized bus, as I have driven an rv, and anything beyond 25 feet is overwhelming. It would be nice if I could find something that is at least 15 mpg if that is at all possible. And at that rate I wouldn't mind it being gas ... I guess. Though I really would prefer not to keep feeding the fossil fuel addiction we humans have, or did I mention that already?
That said, there is one Ford on offer locally, and this is it. 2003 Ford Econoline E450 powerstroke Diesel Van School Bus 30Passenger
I just don't know if it's worth this much money. And I don't know if I will be able to carry the biodiesel I buy long enough distances to find the next biodiesel station. I do get that biodiesel is not the best solution either, but I'd prefer it until we get an all electric, solar powered vehicle with enough power to carry me and some furniture around the country for a few years. Thank you for all the info and help.