If you've got $15,000 burning a hole in your pocket, why not grab the new GoPro Odyssey, a 16-camera rig that was developed alongside Google for their VR platform; Google Jump.
The new Odyssey rig is available in a very limited quantity, where it includes 16 GoPro cameras, connectivity mounts for each camera, memory cards, a pelican case, and the beautiful Odyssey panoramic capture rig itself. Once constructed, the GoPro Odyssey will shoot 2.7K video in the 4:3 aspect ratio, for beautiful 360-degree/3D/VR video.
The Google Jump platform itself includes a video "assembler" that will stitch all of the videos together into a seamless globe, when then you can playback through YouTube with support for watching it through Google Cardboard in stereoscopic/3D, or in normal "flat" viewing through the traditional YouTube app or desktop. GoPro says that the 16 cameras output at 2K x 2K panoramic MPEG4 video at 150Mbit/s, or 8K x 8K at 600Mbit/s.
The Odyssey will be available through an early access program for now, as long as you're based in the US, Canada, UK, the EU, Japan or Brazil.