I like the idea of a travel blog, personally I don't think travel blogs are huge on revenue unless you can sell some airplane tickets or something, but I would also suggest digging around for another layout, yours looks too "free". Anyways best of luck with your blog, I know it's not easy running one checkout mine in my signature.
Well its looking good but you can transform your header in something with movement, in an animated gif, this will make it more alive.But its a nice blog, good luck with it