[Battlebasset]

Pulling not as hot air into an area of hotter air isn't going to change things that much. The best you are ever going to get in your garage without air conditioning is whatever the outside temp is.

Also, if you have a ridge vent, putting an attic fan in is going to mess with the process of the not so hot air being naturally pulled into the attic by the simple fact that hotter air rises, which then pulls in the not so hot air via the soffit vents. So you won't gain anything, and you might make it worse.

If you really want a garage that can be used as a living space, you need to fully insulate and AC it. And as soon as you open the garage door to pull a car in/out, you get to start the cool down process all over again.

I installed a ceiling fan in mine to move the air around, makes it a little easier to be out there. I also have a rolling portable AC unit that I had up north. If I plan to be in the closed garage for an extended period of time, I set it up and let it run. Pulls out some of the humidity, makes things a little cooler, and I can go stand in front of it when I want a cool breeze. You can get one for about $300. Probably the most cost effective somewhat of a solution there is. But you will need a window in your garage to exhaust it.