Edit Wordpress Plugin

I need a membership plugin for my Wordpress website. I have tried several different plugins, but none have everything that I need. Paid Membership Pro is pretty darn close so I would suggest taking that one and editing it. That said, IT DOES NOT NEED TO BE CUSTOM. You can edit an existing plugin like Paid Membership Pro. Features Required: Several levels of membership - PM Pro already has this, but I need my users to be able to select which type of membership they want and then I will need the ability to send newsletters to my members. More specifically, a I need to send a different newsletter to the different member levels. It needs to be double opt-in. This is very important. I need the ability to force the user to click on something inside their confirmation email and be able to set the url that confirms their membership as a welcome page. A few more details given upon hire. Price is a pretty big factor right now. I am also looking for someone to work with in the future. If I like your work, there will be more in the near future.