Reddit mentions of Zenna Home 7013W, Behind-The-Door Towel Bar Or Tension Corner Pole Towel Caddy, White

https://www.amazon.com/gp/product/B004EPXKLS/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

I bought two of these per someone's recommendation way back and they have served me well. Good if you have a low enough ceiling. Sturdy enough to keep the lighthouses stationary. The only con is that the lighthouse clips have rubber pads which seem to chemically react to the plastic on the arms of this product (it looks almost melted together after a couple years now. Doesn't detract from function though.

I would recommend floor to ceiling tension poles. These have almost no footprint so they are perfect for maximizing room space

https://www.amazon.com/gp/aw/d/B004EPXKLS/ref=mp_s_a_1_24?qid=1463632733&sr=8-24&pi=AC_SX236_SY340_QL65&keywords=ZPC+Zenith+Products+Corporation&dpPl=1&dpID=218-XCY%2BxHL&ref=plSrch

And then these to secure the lighthouses to the pole

https://www.amazon.com/gp/aw/d/B00E5M39AW/ref=yo_ii_img?ie=UTF8&psc=1

Aussie checking in. I have a less industrial version of what the guys here are suggesting:

http://i.imgur.com/5d0j8Rp.jpg

It's a tension pole from a shower shelving system, spring loaded so it presses between the floor and ceiling. 6 months in and the setup has been rock solid (im lucky enough to have a high cupboard with 240V AC inside of it on the other side of the room). Bought on amazon, you just gotta find an item they will ship internationally. Here's the link for the one i purchased:

https://www.amazon.com/gp/product/B004EPXKLS/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Alternatively you can hit up the hardware, some terms to help you get your google fu on: contractors poles, drywall poles, tension poles.

You'll also need a suitable clamp. It takes a standard 1/4-20 camera mount.

Is free standing a requirement? I use bathroom towel racks with clip-on camera mounts.

Towel rack Zenna Home 7013W, Behind-The-Door Towel Bar Or Tension Corner Pole Towel Caddy, White https://www.amazon.com/dp/B004EPXKLS/ref=cm_sw_r_cp_apap_7rTrTqcmsy4jj

Camera mount Camera Super Clamp Quick Release Pipe Bar Clamp Pipe Bike Clamp w/ 1/4"-20 Threaded Head for DSLR Camera/DV/Ipad/Monitor,for Ipad Mount/ Music Stands/ Microphone Stands/ Motorcycle/ Bike - Large Size https://www.amazon.com/dp/B01EQF082E/ref=cm_sw_r_cp_apa_8bktzbHHMWTVC

> http://www.amazon.com/Zenna-7013W-Behind--Tension-Corner/dp/B004EPXKLS/

Wow that last link, the tension pole, seems like it could be a good cheap solution!

What about something like a floor to ceiling tension rod?

http://www.amazon.com/Manfrotto-170-Spring-Loaded-Ceiling/dp/B001M4HUGA

(I'm guessing you'd be able to find or jury rig something less expensive than that particular item.)

A floor to ceiling rod seems like it'd be an even more stable non-permanent solution than the tripod solutions people have been talking about, with the advantage of having a smaller, almost non-existent footprint.

edit: Here's a cheap floor to ceiling shower caddy pole that might do the trick:
http://www.amazon.com/Zenna-7013W-Behind--Tension-Corner/dp/B004EPXKLS/

I got these along with these. Haven't gotten them or the Vive yet so I can't speak to how well it works, but it should do the job. Two of these with two clamps were $56, and less space than a tripod.