We have succesfully completed many e-commerce project for International clients with shopping cart, multi lingual , paypal payment gateway, orders and invoices. Projects have been completed using Wordpress/WooCommerce, Magento, Drupal etc. Quote is for Wordpress Woocommerce based e-commerce application. It is advisable to purchase ready made responsive themes(ready for mobile devices) for best look and feel.
We will install Yoast or All in One SEO for SEO management.
Standard Paypal for payment as well.
Using Wordpress , Woocommerce is economical and easy to maintain. We will be there 24x7 to reply all your queries.
Thanks.