I agree with everybody else, definitely a reasonable goal. Especially as you've been around, you know the system. I'm also doing it at home, the great thing is that this forum is such an awesome support system for everyone...
If you find that you're plataeuing you may want to look over the Wendie plan idea. I may be trying that, but I'm still getting the hang of the points stuff and I have been losing. But, I've heard great things about the Wendie way too.
Keep up the good work. You'll get there one step at a time!!