I would do what @joannekwan said, just post it on Tumblr and give them the password to see it. You can make a separate blog linked to your main account only for your pages accessible only to patrons and change the password every week or so (we all know people love to share passwords. How many people do you share your Netflix with, btw? haha).
As for the reward tier, it's really up to you. Personally I would do it at $5 because I do one page a week, but 20 panels plus the extra work of having the Tumblr open plus changing the passwords weekly plus letting everyone know the new password, I would place that reward on the $10 or higher.