[MarkCole]

Well with regards to #1 a lot of vendors with your revenue find themselves able to negotiate better rates with payment processors, particularly in combination with a merchant account. Shopify have obviously negotiated a deal with their payment processor based on their volume.

People build their own still for a multitude of reasons, one of these being may be that they don't want to be locked in to a single platform. If Shopify shut down tomorrow, would your business be in trouble?

People also want custom features, better analytics, control over SEO, and all those extra things that aren't currently possible with Shopify.

At 500,000 a year, a sum like 5,000 is nothing, especially if you feel that you can increase your revenue by 1% or more with a new custom site.