What is your x and y size (width and height)? That will A LOT to do with how long the anim renders. It certainly shouldn't be anywhere near the dimensions of still image renders.

The image above is 444x176 - while this pic is not from the Poser portion of the anim, the Poser rendering time was minutes not hours - and 444x176 is even a little larger than I normally do because I want the file size to be managable enough for people to download. But I should think that any size smaller and up to this would be fine.