Can confirm, window motor replacement's not terrible, and Youtube will probably tell you exactly how to do it for your make/model/year (did for our '01 Honda, which is the only car we've ever had power window problems with)

If you would like a challenge, get yourself a 1996 or newer Land Rover Discovery or Range Rover and try fixing the guaranteed to fail central locking or window regulators. A window regulator at a dealer is a 5 hour job. Owners who do things themselves avoid this job for as long as possible because it hurts to do it. Both of these systems can affect the alarm/immobilizer too, so enjoy being locked out of your car at a service station 100 miles from home.

Hardest is to dis- and reassemble the whole thing. Inside it's pretty simple.

I have to do this on my mother's car. Surprisingly both doors internals started to fail around the same year.

Mitsubishis have always been notorious for shoddy build quality.