Great question — answering as the UphillTech team:
Okay, I've made enough suggestions in the comments I figured I'd better summarize them in an "answer." It's not fully what you asked for; this is more of a summary of all the "almost what you want" options I and others have come up with. Maybe one of these suggestions will give you a new idea that you can improve on, of maybe one will turn out to be good enough. Get two tents. Each tent will be less expensive than one tent that combines all the features you wanted. The cost of gear goes up a lot for a small decrease in weight, so you can save a lot of money by simply not trying to squeeze the two person tent into your solo two pound limit. Use the savings to buy a second, single-person...
Full answer by csk: https://outdoors.stackexchange.com/a/27155 (CC BY-SA 4.0).
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