Amazon's ever-expanding retail empire is going to need more workers and vehicles to get millions of packages to shoppers' doors. To do so, the web retailer is encouraging people to start their own delivery businesses. For those in the U.S. willing to strike out on their own in the service of the e-commerce giant, Amazon will offer financial and operational support, the Seattle-based company said in a statement. Startup costs can be as low as $10,000 and they will get access to discounted trucks, uniforms, fuel, insurance and other resources, Amazon said. Amazon has been working on ways to expand delivery capacity, from leasing its own cargo planes to experimenting with drones.