SP - Fulfillment company

I used to think that Amazon handled their own orders and didn't source for a fulfillment company. Obviously I hadn't been thinking nor been educated in the field of business then. It would be expensive to set up your own fulfillment centre, right? It'd be possible to have everything under your own name; deeds, titles and shiz. Provided you make a tonne of money all the time. I realise I have this old way of thinking most of the time. How ah?