You can get a cheap, light, and usable headset these days for <$100. It's called the Quest 2.
You can get a high end, light headset. It's the Bigscreen Beyond 2, and it's ~$1,300.
As for high end and cheap, there's the Pimax Crystal Light. It's $600 (~$890 with required subscription), very high resolution (2880x2880 per eye, 35 PPD). I can't find the weight on their site but I own a Pimax Crystal. It's bulky and heavy - which I know quite well, as I stream multiple hours in VR very frequently.
Right but my question is rather if there's a big enough market to eg make something like the Bigscreen Beyond 2 much more affordable or the Pimax Crystal Light much lighter.
I'm not into VR stuff and it still seems like an extremely niche thing. I have friends who are into VR but they have spent way too much money into it considering a driving chair, steering wheel, pedals, high spec PC, etc.