Ok let’s think about this,I’ve been spraying for 40 years ,you don’t need high-end equipment to get good results. Why don’t you start at the low end HF $16 gun,it works great. Spraying is a matter of practice,so start with this gun ,practice spraying on some carboard or a sheet of low-end ply. After trying this out on some small projects this will give you an idea whether you want to do your own spraying or not.then if you want to upgrade from there at least you will have a feel for what spraying is all about.
You can learn a whole lot by subscribing to Charles Neils online finishing class,about finishing and all involved,including spraying,
it’s a bargain for only $11

http://www.cn-woodworking.com/finishing-class/

http://www.harborfreight.com/20-oz-high-volume-low-pressure-gravity-feed-spray-gun-47016.html

woodworking classes, custom furniture maker