Hi Sandy.  I'm new to this forum, but I thought I'd add my opinion on this issue.  Of course, as you say, there are certain types of writing gigs that pay more -- such as copywriting.  So, a writer who is setting out to earn the big bucks as a freelancer might be wise to specialize in one of those  higher paying niche areas.  But in general, I think how much a freelance writer makes depends on what his/her goals are and how committed they are to finding work and delivering quality product to their clients.  A big part of earning enough to really pay the bills, for me, has been not settling.  I won't take jobs that pay less than I'm worth, and I've never compromised.  Yet, I have a steady flow of work, and my bills are always paid.  That's always been my goal - to work just enough to support myself, so that I can spend my time enjoying my life.  I know the amount of money I need to make per day, per week, per month, and I work hard to make sure that what I earn averages out to what I need to be making.  If I fall short one week, I pick up the slack the next.  So far, it's been working for me.  I'm not in this business to get rich.  I don't need a six figure income.  But, if a freelance writer's goal is to earn a six figure income, I do think it's possible, if they're willing to commit to that goal.

Angela,
Thanks for your opinion. As I see you have big experience in this area and your blog really provides great job opportunities. I will advise my friends to visit this site.

"how much a freelance writer makes depends on what his/her goals are and how committed they are to finding work and delivering quality product to their clients"

It's true, but it's too general. Prices vary significantly in the web. And sometimes numbers - are best advisers 

Simon,
I'm sure this year will become  successful for you, you have 7 months to prove it!

I guess there is a category of writers for whom writing is life.
I don't think that spending all time on job is the best solution and of course I don't belong to such category

Especially in the beginning of freelance career it seems very hard to earn money, but actually there are many sites in Web which need freelance writers.
Some of them are discussed on forums and on this forum also.
Economy, technology and social issues are popular themes for freelance writer so I'm sure that soon you will find freelance writer job. 

Hmm.. if you think money is the most important thing in writing, then why don't you try writing for college students. In this market you can find jobs that will allow you to write about religion, technology, politics, etc. Besides, sometimes they pay up to $25/page (e.g. PENCAMP, etc.). Surely, such a job may be contradictory if considered in an ethical context, but still it brings enough money to pay, for instance, your rent or mortgage..