Definitely agree they should have mentioned it before hand, but I suspect they are following the same as other products that do not disclose the shipping costs.
From my experience, roomscale is hands down worth the premium. Non-forward facing experiences with hand controllers is where it is most definitely at. Its absolutely intoxicating. That works across seated, standing and roomscale but isn't something other headsets are focusing on. Standing and preferably walking even a little is so powerful vs stationary seated. 5ftx6.5ft is the minimum for roomscale, which I think is fairly doable with some shuffling for many, but the 360 focus is still there for standing and seated thankfully
do you know if you can arrange the lighthouses in a wider area but use a smaller area for gaming?
In my home setup, the PC is in a separate alcove which might just about be enough for standing, but is definitely where I'll do any sitting games. But for room scale (small), I'd need to be in the other half of the room. So ideally I'd have the lighthouses set up to cover the overall area.