Fintail Fan, maybe you need to make repairs on your own car. That can save you money right off the bat.
Of the repairs listed, you could have done some yourself:
New serpentine belt tensioner and belt
New MB radiator, hoses & clamps
New motor mounts
New Oxygen Sensor
New catalytic converter and rear muffler
New front and rear rotors and pads, (twice)
New ABS Sensor
Rebuilt Becker Radio and new amplifier
Four Bridgestone tires on Borbet S, 5 spoke rims & a set of Nokian WR snow
tires on four original MB rims
(Now, did you really need those new rims?)
Bosch Euro headlights with driving beam
(from what I've heard, the early transfer cases were problematic) (rhymes with 4matic)
An aftermarket radio would have worked too, for about 200 bux.
I realize everyone's skill level is different, but there is a lot of good info here on repairing your car.
Just my opinion.