Custom built multi channel E-commerce website, suggestions ?

Im an Amazon seller, looking to branch out into Ebay/own website and have everything controlled in one place.

What are my options ? Shopify is good, but im looking for better. I hear that Woocommerce is bad, Magento is very expensive. Im a bit lost, for those who have had websites developed, what did you have done and how do i go about finding a company or person to supply one ? im not sure about using someone from Upwork.

Any help or suggestions would be great,

Also to note, i do not mind if the website gets low traffic, the main point is to have everything centralised between Ebay & amazon.

Thanks