Eaves are less than ideal for exhaust vents, they frequently have soffit vent intakes, and most dampers on the vents are controlled by gravity which works against you upside down
The "issue" with doing a new hole in the gable (just cutting through the siding I presume) is it gets a lot more complex dealing with caulking/waterproofing, etc
I do a almost everything when I remodel but for the two vents I needed in my walls I had my siding guy do it. I did not relish the idea of trying to figure this out on top of an extension ladder (and I did not want to damage the existing siding).
he was able to order the vents in the matching color and do it real quickly so I could worry about finishing the inside of the room. It certainly did not look hard to do but it was cheap enough that it was not a big deal.
Well, 1/2 of the gable vent is already blocked off by the fan anyways - maybe I should just seal off that whole side (and stick the attic duct exhaust in it as well)
In other news I will never drive screws without this again:
On the 2" one there is a sliding collar that keeps the screw attached and you just push in and it retracts as you go
the only issue is I need to remember to retract the collar before it goes all the way in otherwise I overdrive it (I should just step down the torque so it doesn't strip it though)
It would be nice if the magnetic sleeve automatically retracted on those bit holders. I do like to use them for training new volunteers on how to drive a screw straight without stripping the screw head.
Personally, I never plan to drive screws into thick wood (not so much on the delicate stuff) without an impact driver, they make the job go so much easier.