I am very interested in the project that you have posted. I am fairly experienced in writing SEO articles, along with being a native English speaker. I can write ten (10) five hundred word articles within a couple of hours, probably up to fifteen (15) articles or more per day.
Should you select me for the project, I do have a PayPal account and the milestone is not necessary- it was only left there because Freelancer requires it when expressing interest in a project.