Nice, any links to the unit for 1k? I would like to see what size it is .... what size do you use for 1200 sq ft.
My current unit is either a 18k or 24k unit - can't remember - I wish I would have gotten one unit bigger, the far side of my garage is warmer then the other side, this only matters during poker nights in the summer - if I'm woodworking, this doesn't matter b/c i'm not on that side, all my tools are on the other side.
Here's a unit less then $1K. Typical garage is only 400 sq ft. so this unit would be fine if you insulated everything and your garage did not face west.
Running a new 240 volt line for the unit is what is $$$$$$ - if you know what you're doing you can save $1K right here.
I hired a local A/C company to make up the connections & release my freon - they also run a vacuum test to make sure there are no leaks - that was $300 - money well spent.