Hello Sir,
I am a WebDeveloper and Security Engineer at Electronic Arts and I think my experience and skills will help me do this job.
Ok, so let's see how can I help: I see that you already found an API to work with faxes and email and that looks really good but I also have some other options if you are interested in.
I also have a question regard to "charge user credit card" - what does this mean? want to use some kind of paypal API or something like? or what service would you like to use?
From description, I understand that at this point you do not have an website, a template or something so the freelancer you will select, should start from 0, right?
I can also offer some help with design and user interface (I worked some years in PhotoShop and I also have some friends that are designers so I can ask them for some help here).
Do you have any service allready? Like a database where to store users etc (I see that you want a sign up form too - some kind of admin panel)
I think it is better to discuss this via PM because I have some more questions and ideas for this project, so if you are interested in a collaboration, I wait for your message,
Thank you, have a nice day!