Thank you all for the replies. I'll be driving to the dealership today and see what kind of deal I can get. This is not my first auto purchase, as a 46 year old adult I have bought cars before, with way better credit than I have now.
I'm also educated in the tricks dealers use to get the most out of my situation. I've almost always have gone out and gotten a car pre qualified with a credit union loan, at very good rates.
My situation is such now that, while money is tight, things will vastly improve within the next 6 months. I just want to buy now because the X3's available out there now, are in the year / mileage range that I've researched and will be a good value for the amount I'm looking to spend and afford.
It sure will be a bummer for me if I can't drive out of that dealer today in my X3, but then again I won't be out of a ride and my Explorer is still in great shape plus I won't have to worry about the unexpected maintenance pitfalls of the X3.