Guess there are key words in your question. Girlfriend instead of wife. Is there long term commitment warranting changes such as "house" and "RV". Probably, or you wouldn't be considering it.
Does she go with you and LOVE it, or is her preference just because she THINKS a pop-up will make a house move easier? I mean you can store a pop-up outside as easy as a hard-side. But can you find a house where you can justifiably store a camper in ONE WHOLE garage bay? Do you have two cars? Does the change plan require finding a house with a three car garage? Might make house hunting a bit HARDER!
Some pop-ups will be better quality than others. I think THAT will become more important than whether "pop-ups" in general are comfortable enough in the wind. Hard to do other than trial and error, but if you look at enough brands you'll get a "wind related" comparison soon enough.
Our pop-up was a 2003 Starcraft Lonestar and was too awesome (and that isn't top of the line). Travel is so easy. It allowed snow (dust?) intrusion especially around the door, because there was no door header in the base unit, just the pop-up top roof. That upper box area "spread" a little over time. If you do it, I recommend a "short door" to avoid that issue. No cassette, just a porti-potti. Loved the ease of that for dumping (frequent was acceptable over trying to locate an RV dump station), Like a cassette, you can use an RV dump OR an outhouse, and everything in between.
Smaller fridge? Beer get's it's own ice water cooler (better than fridge anyway) and when the ice melts you add beer to the fridge nightly for the amount you drink daily. Produce get's it's own cooler (a couple of blue ice things) and that keeps the stuff from freezing in the fridge due to cold spots. Those two things free up a LOT of fridge space for other stuff.
Maybe girlfriend is thinking about the ease of popping up the camper in the garage for cleaning, loading, unpacking. Or not even a need to pop-it up for much of that. Makes those tasks much nicer if it isn't outside (assuming it's windy or cold or hot out there, or if the outside storage is much further from the main living area than is the garage storage site.
And btw, it's NOT still a tent. There are so many differences it's not even worth addressing that statement. (No offense meant here).