Lenses are expensive and great lenses cost even more. While DSLR prices have fallen to the point where great cameras may be purchased under the $1000 threshold, professional lenses often begin at $1000.
[UPDATE: This has proven to be a popular build, but what if you want to stretch your budget to $800? Check out this newer mini-ITX, 1440p gaming build!] There’s a widespread misconception floating around