If only they took the processing hardware out of a kit like Pico4 or Quest3 to make them PC only, you'd get the lightest, most capable form of VR possible. A distant hope would be something on par with a snowboard mask in size and weight. The quest2 in particular, without any comfort options like the better strap and more comfy padding, is among the least comfy kits I know. Also make sure your IPD and in-sim settings for lock-to-horizon etc is ideal for your preferences, as that reduce eyestrain and nausea a lot.
As for "immediately not being as fast as on triples", you will need an adjustment period, this goes both ways.
Got a Playseat Challenge myself, pretty decent for the price and handles my g920 well. Some vibrations from FFB goes into the frame but I just think it adds to the experience. I also drive in VR so I can just chuck it up wherever and drive all day without needing to have monitors set up. Easy to transport if you move too. Hardware can remain mounted while folded up.