I have a 14 X 17 Montana Wall Tent. Canvas top, realite sides, and it sleeps 4 adults comfortably. 5 or 6 is pretty tight. I also have a table for cooking set up inside as well as a space for a heater with chimney. You'll want a heater for fall especially. I like to camp during deer season so it's more comfortable to be able to cook inside as well as a place to sit, have a beer, and play some cards. I've thought about adding an addition to the front which would then easily sleep 8. Have slept 13 - 13 to 14 year olds but that was summer and they were sleeping on the ground side by side.
The tent with realite sides and canvas top is about 1/2 the weight of all canvas but in the wind the sides also flap more. Both have their advantages and disadvantages. My tent is 20 years old and still in very good shape with some repairs over the years. You don't backpack very far with this tent but it is comfortable. I use a propane heater (30,000 BTU) as opposed to a woodturning stove. In 0 degree weather I do light a sunflower heater on the far end to dress in the morning and also at night as we're sitting around visiting but we all have very good sleeping bags and cots with closed cell pads and are very comfortable. Keep in mind that comfortable is a different definition for everyone. When it's below 0 outside and I'm sleeping far away from the heater, at 35-40 degrees, with my sleeping bag I'm very comfortable, pretty sure my wife would get up in the morning and tell me "Never again."
As with all outdoor equipment, quality is important. You will get what you pay for. At the same time, when you're camping with family or friends and all there is to do at night with no electricity for the TV, etc. is to visit and go to bed early that time is priceless. I'm also at the age where I don't want to get up very often in the middle of the night to pee so I don't drink as much beer as I used to. :;:cheers