My friend. Your piece is written with passion and beauty. It reflects your enthusiasm in photography. Quite commendable.
And it gives me some inspiration too.
Well, at the same time I do want to give out some warnings, because the VR180, 3D tech...etc are still in high risk area.
Around 2012 everyone was so sure that 3D TV was the future, then it flops so bad that today only few movies are made into 3D Blurays. 3D TV shows are like extincted.
3D VR180 so far is doing good, but only in niche market. It will take some time to, or if it can, go mainstream. Apple's VR gives us some hope, but the price tag is too high. Few people can afford it.
I am currently doing 3D VR180 as a hobby, using 2 cheap Kodak SP360, because I don't want to spend too much in it. Many people got burnt by 3D before. I don't want to invest too much in it yet. Or maybe I am just cheap like that.
For you, if you are determined, Canon R5C is a good choice, but you need to know how to mod it into 65mm IPD. Or wait for Canon to release the proper twin fisheye lens.
MacBook pro of course a good choice for 3D video editing, but so does PCs with good NVIDIA video cards. It depends on your skill and effort, not just the machine.
Shooting VR video requires the platform to be very still. You need to look for good tripod or stable gimbal stabilizer. Small fisheye cameras have advantages here, because they are easier to stabilized. For this subject I think you know much more than me.
Vuze XR is quite a decent VR camera to start with your journey of VR. It's small, easy to use and resolution is good enough. Maybe use them to do all the practices of shooting, editing, and posting?
In all, I wish you have a great journey in your pursue of VR video. It will be fun for sure. The immersion feeling of VR videos is unique and engaging. This field should be explored a lot more.