I may have missed something, Why does your wife have two vehicles?
YOU should have two (one primary and one just for fun)
Fix the two (when able) and sell them (or keep one only)
Trade in the Mazda for a newer, pre-owned Mazda with a "slush box"
Save some upgrade dough and buy a fun car for yourself, you know like that Corvette you wanted as a kid.... If you need more seats, go with a Mustang or Camaro
Seriously though, downsize and simplify!