I dont see window regulators as a big problem... I can change them out pretty quick. It helps to use ALL the windows in your car on a regualr basis.
I hope you paid for that tranny in canadian dollars, most places around here can do it for less than 2, easy.
The door hinges you speak of are called door check straps. broke on my 116 car, but not on my 126 car yet. Easy to replace also.
Nasedo- These old cars (and they ARE getting old- newest 126 will be 13 this year) are a lot of work. They are really only worth it if you can do your own work or see the car as a hobby, otherwise the repair bills can break you down.
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.
1973 220 (gas)