Weight does matter as a well has how many are sleeping in the tent, I have a Tepui Ayer 2 man and it is all of 95 lbs some the bigger tents getup 130-150 as mentioned. There is also the issue of size a hard shell will use your entire roof for the most part.
Here is an image of the 3 options:
A James Bourd knock off, my Tepui and Triangle opening on the White defender. Cost goes up pretty fast the Tepui was 1200.00 CDN the one on the Defender was about 4500 and the JB knock off about 2100 Cdn. Roof rack or load bars are an additional cost.
The clamshells are also higher when closed up
Setup and take down on the hard shells about 5 to 7 minutes , 15 for me but I am fussy about getting everything tucked nice.
Best thing as noted park and sleep anywhere, this is an unused dead end logging road, we ran out of day light and called a day for safety. The 2 people in ground tents took 30 minutes to setup, trying clear rock and find a spot that would stay non-muddy in rain.