I am looking to a 3 or 4 room large Insta tent. Not for cold weather.
If it rains water can get into the tent too easily if you don't have a floor built into the tent, unless you are placing the tent on a platform off the ground.Old thread, but why not just get some ice fishing tents? They are the exact same thing, just stick a group mat down.
the large Ozark tent I got was a 3 room and wasn't any bigger (probably lighter) than if I got two smaller ones that would end up collectively being as large as the Ozark Trails tent. However it sucked to setup and take down. It was advertised as quick and easy, one person. You need two full-size taller people to set it up. Because my wife is shorter than those that Ozark Trails anticipated we were unable to but it up and therefore not able to take it down. I just waded it up, wrapped a bungee around it, and through it in the back of my car. I then shoved it in a cart and dragged it into Walmart, took my bungee or, it folded out, the cashier laughed and gave me my money back.4 room tent is going to be stupid huge, heavy, and hard to set up even being an instant tent. I think the closest you are going to find at a reasonable price is going to be something like the Ozark Trail 20x10 Dark Rest Instant Cabin Tent. Mind you, I personally dislike Ozark Trail tents, but this does suit your requirement... Why one giant tent instead of 2 smaller ones? The issue with the Ozark Trail tents is that OT does not rate them for use in any conditions beyond a perfect gentle summer afternoon in your backyard.
Now that is reportedly the "official stance" of Ozark Trail. HOWEVER, I have heard good things from actual owners / users of Ozark Trail tents.
FWIW, my all time favorite tent has been my Coleman Sundome 6 10x12 from 2005, sadly I loaned it to a friend to take his kids to scout camp and have yet to get it back, 2 years later...