Hi,
I'm a Wordpress expert, check my feedback and you'll see that I'm your guy for this job.
I can do all tasks listed and can start right away, I'm a full time freelancer and can have it in one day, two days tops (because of the time difference).
For reference, here's a Wordpress site where I helped set up the membership functionality (warning, adult content): [login to view URL]
Let me know if you're interested.
Best regards,
Raul