Let me say that your neighbor does sound like an inconsiderate dick but I wouldn't move over that. As others have pointed out you could end up spending a good bit of money and finding yourself in an even worse situation.
I'd definitely talk to your neighbor about the fan but if you are that concerned about sounding like a dick try to catch him while he is outside and bring it up nonchalantly. For the record, you wouldn't even be slightly a dick to go knock on his door and demand that he fix that shit ASAP. Sounds like right now you have been being really nice by not calling the authorities and building inspectors.
I'd definitely talk to your neighbor about the fan but if you are that concerned about sounding like a dick try to catch him while he is outside and bring it up nonchalantly. For the record, you wouldn't even be slightly a dick to go knock on his door and demand that he fix that shit ASAP. Sounds like right now you have been being really nice by not calling the authorities and building inspectors.
