Honestly at this point it's not so much about money as it is about whether or not this particular case/setup/components combo is salvageable with minimal effort.

The CPU fan is rarely an issue (it mostly just goes bananas when IntelliJ gets its business on with gradle on a new project XD).

The GPU is the main culprit and I'm not sure there's any solution there that doesn't involve just replacing it.

Depending on the fans it may be possible to re-oil the bearings.