In the short term, my goal is to make a regular payout ($50 / month). In the long term, I'd like to fall in the $100 to $150 range per month.
This is, however, only one part of my online writing. I also maintain several of my own websites, and my short term goal is to earn about $500 a month collectively, and in the long term I'm aiming for about $1,000 a month.
So HubPages makes up a piece of that "portfolio," so to speak, and it is also a great form of content marketing to help drive traffic to my other sites. For example, I write a lot of hubs about photography, and in those hubs I can link to relevant articles back on my photography blog.