Good grief! that price on the gun… I got mine much cheaper than that at my local Jerry’s Artarama!
http://www.jerrysartarama.com/art-supply-stores/online/4700
If you get it, it’s easy to take apart, very few parts might I add. But you must clean it after every use and make sure it’s dry before putting it back together.
But that’s a good price on the compressor (exact one I have).
I use Golden Fluid acrylics and Golden Airbrush medium to thin the paint, it’s a 1:1 ratio mix.
When I got mine, I used BADGER Air-Opaque paints for practice. They’re already thinned down.
I hope you’re not giving up, so goodluck!