Long story short, I just bought a car for the very first time (as my credit is a bit better than Eric's, we did the purchase in my name, rather than his or ours). We now own a midnight blue (with sparkles!) 2007 Saturn Vue, currently dubbed the Beast. It has enough space that we got all the games that had been in the backseat and trunk of Froggy into just the trunk area, and still have the backseat clear. The plan is to keep it that way - I'm under orders from Eric to give him hell about it, and believe me, that's the plan (no matter how much Stultz claims that things will expand "like foam").
I think the Beast will serve us well, and it doesn't feel nearly as big as I expected it would. It has some amenities that we hadn't expected (heated seats, which are perfect for Eric's back, and air conditioning), and we'll be able to put the nice stereo from Froggy in without issue. Eric's working to see who he knows from work that can help with the installation.
All in all, the important thing is that we're back on the road, and we shouldn't have much trouble with the car payments. I can only thank heavens that this happened AFTER I got established in the new job, because we wouldn't have been able to do this if I was still temping. No way.
Feeling like more of a successful adult, now. Scaaaaaary.