We also have a behemoth of a tent - it's canvas with steel poles, sleeps 6 comfortably but if sold now would be marketed as 14 berth I suspect. However, the canvas alone takes up an entire car seat, and the poles are ridiculous. It's 65kg all in. Absolutely amazing when it's up though - you can stand up in every corner, you can cook in it because it has a special stick-out vented bit, you can sit 8 people down to eat inside when it's raining. It's an awesome tent. But, it's massive and weighs 65kg. It's not worth it unless you're not moving it for a week, and if we use it we always need the trailer. (Apaprt from that one time we didn't take the trailer and it rained as we were packing - we'll not talk about that time, if you don't mind)
We now also have a smaller, lighter tent. It's not cotton, so it's not so warm on cold days, nor is it so cool on hot days, and it definitely isn't as quite on windy days, bit it does fit in a bag you can put in the boot without thinking "Right, well that's pretty much full" We didn't want to lose the ability to stand up in it, so we eneded up with a 'Dutch Mountains' tent from Obelink - it's narrower than the massive tent, but almost as long - you can get double air beds in both pods, and eat and cook inside, and stand in almost all of it. They don't seem to do our exact model anymore (it's 3 years old) but this one seems close (it's bigger than ours) and is in budget
https://www.obelink.co.uk/lugano-6.html?category_params=s_company=4&category_id=4188 It is much quicker to put up, and becuase it's lighter it's less tiring, and one person (me, usually) can do it alone. You've no chance doing the beast on your own, a pole would crack your skull soon as look at you