You could easily get a solid state Ampeg head and suitable Ampeg cab(s) used for $1000 or less.
Honda Fit....well, that car has a deceptive nameWith the seats down, measure the rear space before you shop for cabs. If you can fit a 1-15 Rumble, then you should be able to fit a 1-15 or 2-10...but you really need two and that might not fit. You can always put the head in the front passnger seat.
Probably too big for your car, but I've been seeing used Hartke 4-10s for under $200 each.
I've fit a guitar 4x12 plus a drum set in my car. I'm not sure I could fit every 4x10, but I got a pretty gigantic (newer) Acoustic 1x15 in there. No fridges, though, and I can imagine an Ampeg 4x10 that doesn't fit. The SVT 2x12 would fit. I could easily fit a couple of 2x10s and a solid state head in there.
With the seats down, measure the rear space before you shop for cabs. If you can fit a 1-15 Rumble, then you should be able to fit a 1-15 or 2-10...but you really need two and that might not fit. You can always put the head in the front passnger seat.