I started this as a hobby, wanting to get pictures of my two little sons, now are teenagers. (Blows my mind.) I started with a 10D and a 28-105. I won an auction for the film EOS 3 camera, and that ruined me. FF and film was amazing. I was not sure digital would go the distance. As the technology is catching up, and maybe even as good, I decided I missed FF and went with the 5D when it came out. I don't earn any money, I shoot pro bono, but the cost was something I was willing to go with. I actually saved up and bought everything one lens or camera body at a time. Really wasn't a one time thing. You will find that FF is great! and you can't live without it, like me, but you can also do really well with the 1.6 cropped body. My 7D is almost as loved as my 5D2. It just depends on what you shoot. As for justification for the cost, don't do it if you have to feed your family. If you can save a little here and there, ask for gift cards for birthdays, etc., you can get there within a reasonable amount of time. And the 5DC is still amazing. Used, should be around $1,000 now.