There are alot of factors in how long an animation will take you. Dynamic clothing and strand based hair for example. And also post work.

This is an example of an animation that I did trying to learn motion blurring. It's all done post in GIMP, and I rendered the animation to image file (.png) and did the composite in Virtual Dub.

Soooo... the actual animation took about 10 minutes to do because I simply loaded Walk Designer.

The render took about an hour or maybe a bit more because of my render settings. I render to 1920x1080 for a 16x9 HD resolution.

The post comping took about 5 hours to complete.

 

http://www.youtube.com/watch?v=MEgt3KnhN6Y

There are other animations there if you click on my user name...

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.