Before intially having no option, but to live in my car. I had lived in a sutuation where bills and home repair got really tough for my mom. So peeing in a bucket, washing from a basin of water, and living without electricity (and no warm water) happened long before living in a car. And when I was in that house without perfect plumbing and no electricity, I was stuck with just living in that one spot. Not to mention, embarrassed about it. Now, with my car, I can at least drive to a pretty park after work or anywhere I'd like on a free weekend. When my financial choices became keep the car or keep the apartment, car was an easy choice. I have never actually camped (Black people don't camp, lol.....I realize this is an untrue generalization) but I have lived with very little modern comforts before, so urban camping took some compromise but wasn't a misery to transition to. And I would love to camp outside as I love nature. I want to try a night in a tent at a campsite.
I think there is a choice between freedom and "comfort" in that ultimately you *could* (in theory) live in a temp controlled building with a temp controlled food box and city water pumping through pipes at your beck and call. The price of this for *most* people is no traveling or less traveling. These are, undoubtedly, "comforts" that even in the most high end RV are going to take some effort and $$$ to replicate. But even the most low end functional vehicle can drive you a lot of places.
I think for your friend, the question is even if she gets her RV is she willing to educate herself on the electrical, water systems, dumping her tanks? Yeah, her toilet "looks" like a house toilet in the RV, but her tanks aren't releasing themselves to sanitation for her. Electric also isn't pumping to her sockets on there own. Is she willing to educate herself on solar, buy a generator, learn how off the grid power systems work? Is she willing to live with limited internet? Is she planning to RV park hop. Does she understand the limitations of that?
The risk with RVs off the show room floor is that they feel/look so much like apartments, people try to work toward apartment-life in them sometimes without educating themselves on how it's different. Does she realize life on the road is essentially driving your home through an earthquake every time you move? (Don't leave out those delicate items on your tables!).
There's a lot of "just know this is a thing" before you hit the road in a vehicle AND give up the sticks and bricks. And It's good to know it and measure it against the benefits of giving up S&B. Learning about camping is exciting to me. I enjoy doing things I've never done and the excitement of newness. I don't mind dirt under my barefeet, I can live with a basin of water bath for a few days before I can shower, I am use to having to deal with the temp outside by layering up or down, I don't need my vehicle to do/be like an apartment. Yes, there are things that would make me more "comfortable" in single moments sometimes, but my comfort in my current situation is my freedom.