Cool you have a solid reason thats great. It sounds like you haven't tried Vive yet. You need to before you write off "gimmicky" room-scale though. I kinda thought the same but after I tried a Vive my mind has very definitely been opened.
I've used both, actually.
The problem I've got with room-scale isn't the tech so much as the games, which from the ones I've seen are very reminiscent of the Wii: fun if you've only got a short time, good to quickly wow a guest, but ultimately not very fulfilling gameplay. Gimmicky.
I like to think I'm pretty creative when it comes to imagining uses for new technology and I've been a gamer ever since my hands met a keyboard, but I just can't think of a compelling mechanic that could fit a 5'x5' square. Myst maybe, but how many Myst clones can you play. Warehouse-scale, now that's another story, but I don't own a warehouse.
I'm sure someone smarter than me will think of something and when I see that first great game come out for room-scale, I'll jump all over it. It just isn't ready yet.