The only all in one ecommerce provider you need to even look at is Shopify.com . We have experience working on all platforms and no one comes close to providing all the tools you need and in a simple to use platform. The user interface operates much like any apple product user interface. 

They offer a 14 day free trial-so you can build your store your self and make sure you are comfortable. If you decide you do need some help, feel free to come back here and set your budget. 

Another option is to get a little help along the way. We can start the store for you in our developer account which will waive the 14 day free trial time giving unlimited time to build the store. Need a quick tip or help along the way? We will have admin access until you remove us when your ready. We offer this service for $50. Check out and we will be in contact by email to create the store and get you logged in.