Would like to demo the setup with a 360 camera like the X4 with 4K resolution, have you thought of this? I have a body mount for the 360 camera so it would leave both hands free and easy whip/pan in post.
Actually needs the weight for this setup and is not too heavy with a mirrorless and already using 18mm which is very wide, but also with action camera often cannot focus well close up and filming snorricam close up person be out of focus.
The only problem I see is that the 'actor' is obviously wearing this large bulky black vest, thus one cannot have any other 'actor' outfit using this set up. I was going to try something similar with a petite actress until I realized that she has to wear the rig first and that the rig would be in all the shots.