Insane. simple, elegant, succinctly explained, def. has a niche in the market, and affordable. kudos to you. Just annoyed I didn't think of it of and had the capacity to execute on something like this.

P.S.: If support for unity AR development is robust enough, I'd highly encourage you to aggressively pitch this to educational institutions. One major pain point is how challenging it is to provide a solution at scale to have students building in VR. A solution to be able to spend a modest amount of money, on something that is super robust, that leverages tech all the students have, and that I could get a dozen of for the price of two of the alternatives, would be a game changer.