I love reading! This will not feel like work for me at all and I am sure I can complete this project with energy and enthusiasm. Aside from that, I also have the skills needed to actually get the work done. After 7 years of working with professionals from the US, UK, India, Poland, and Australia, I've become very comfortable with the demands and challenges of working with international clients. I understand both the language and the culture.
One thing that stood out to me in the job ad is the fact that you're looking to have the articles proofread to sound more like Spoken rather than Written English, and I am absolutely sure I can do that swimmingly. Also, I have a very good eye for details and I work really fast so you can be sure that every hour you pay me for will be worth it.
I can work for 5-6 hours everyday, including weekends. I have a very stable internet connection (15 mbps) and I can stay online via Skype during my work hours, so you can reach me immediately if needed.