If you can fold space, that speaks to the ability to create infinite power.
If you can produce infinite power, there should be no shortages of anything, least of all water, in the entire universe.
There was no shortage of water on Dune. The Fremen had billions of gallons sequestered in Quanats under ground.................
Correct. At that point you can just create your own atoms and assemble the molecules right up to their useful macro forms at that point. Like the replicators on Star Trek Next Generation, but not like the replicators on Stargate 1 (those ones are jerks).