Hello,
You sound a little frustrated with the quality of freelancers you have received proposals from, so I'll assure you from the outset that I'm a native English speaker, from actual rainy England (the North, mostly wet, grey and windy, but home all the same!). I still live just outside Manchester.
I can also assure you I won't disappear! If only I actually had that ability! I'm keen to build my portfolio and expand my horizons as a writer, I would be thrilled to be accepted to work with you long term.
I love writing about anything and everything, I enjoy the process, particularly when I really need to research my sources and get to learn about new topics. I have just written a blog post about the fashion industry in Africa, which actually turned out to be fascinating and I'd be happy to provide this work as a sample.
I'm also happy to write a sample article at no charge so you can build confidence in the way I work and see if my writing style suits what you need.
Thank you for considering me and taking the time to read my proposal!
Hannah