I think what Facebook and its vendors are building takes huge investment and lots of the best engineers you can hire. It's not just an lcd panel with lenses glued on, it's a room scale computer vision system, a VR optimised cpu/gpu with a suite of sensors, a VR software platform, controllers packed with sensors, computer vision tracking of controllers and hands, developer tools, a consumer app store, first party apps, a social VR metaverse, a telemetry system, a manufacturing and distribution supply chain, and a marketing push to get it into millions of hands (and it's also highly likely each headset is sold at a loss). I don't know how much money it takes to do all that, but I know you can't raise it on kickstarter.