I have a client with an existing website using e-commerce. When a user clicks an item to buy, they are transferred to coolcarts.com and then they make the transaction there. This guy is unhappy with his current site appearance and response tie from his current developer. He'd like to hire me, but I have never worked with e-commerce before. We are going with BlueHost and they offer Magento, but no support for it.
Can I develop a custom website and product database for him, and use Magento for the purchase transaction only? If so , how?