>iPhones are the only smartphone
I have an android in my pocket. It cost $50, and I pay $35/month for unlimited talk and text+2GB of 4G internet (speed gets cut if I go over, but not really enough to notice since I don't use it for streaming video). I go to work every day in the ghetto, and everyone there has a phone, including the homeless people. The only ones who don't are the elderly. I'm afraid you don't know what you are talking about.
They get the materials from the same place we get them. Remember: by the time everyone has AGI robots, everyone has AGI robots. Including everyone from the top to the bottom of the supply chain for everything you want to buy. That means they will be super cheap, possibly so cheap that it doesn't even pay to charge for them, instead only charging for premium products, or though advertising (the internet model--a few big spenders pay for everything).
As for cheap land: http://www.thepennyhoarder.com...
You can also buy from the government, who owns most of the desert and mountains: https://www.usa.gov/buy-from-g...
I haven't looked in a while, but they were selling land for about that much ten years ago.
As for the cost of moving, again, it's ZERO. One of the robots goes there and builds you a house as well as its own subterranean workshop, BUILDS A CAR, and sends it to pick up your person who can no longer really be called poor. And yes, they can "magically" produce water by drilling into saltwater aquifers and filtering the water through homemade RO filters made out of graphene, for example. It can do this because it is being controlled by an ASI with a human equivalent IQ of 20000.
I swear, there is just no pleasing you idiots. You are offered ascension to Godhood, and you spit in its face because >muh feelings >muh poor people >muh social injustice