I have city engine too.  It is enough time but u don't own the rights to use the assets - including the low poly cars and facades in your renders. So it may not be enough time to get your own content in there.   It does work well in poser. Consider the indi licence if ESRI still has that  one since taking city engine over. 

MY ONLINE COMIC IS NOW LIVE

I aim to update it about once a month.  Oh, and it's free!