I've owned ever version of Photoshop ever made right back to the very first version back in the eighties.
It is a tool that works better then anything else that I have ever used. It is also something that I just enjoy using and playing with. It is also a standard with lots of great resources and tutorials.
I like this one for Photoshop
http://www.eyeball-design.com/fxzone/tutorial.htm
So how much have I spent? I've spent as much as a persona can spend buying ever upgrade that has been released, a whole fucking lot of money.
I've also bought a lot of filters and plugins over the year for it.
But far less then what I spend on this
each year.