If you already feel like you are an expert or at least good enough to have a job in it, then apply those skills and make something to show your prospective employers.
Again, if your financial situation is not good then all these things just become more difficult. It sucks having a job you don't enjoy, trust me I am in one, but sometimes even if the job itself is not great, the things it will enable you to do make it worthwhile.
Please excuse me if I'm making too many assumptions about your situation, but you just remind me of a similar situation I was in a year ago.
It seems like if that's the issue but you are getting offers then I imagine you should be able to negotiate your way in. That or you could just go into debt momentarily.
Even start ups fly people in for interviews; I can't imagine they'd have too much trouble relocating you. That is, if you're willing of course.