My narrow focus was a water source independent of public supply, or even access to water! You are quite right that you also need a power source to make the water-from-air technology work, and so you should also consider developing power independent of public supply .
It should be possible, but not necessarily efficient in terms of return on effort, to set up a solar-drive humidity extraction system.
A bank of solar cells might be used to drive a conventional refrigeration or Peltier-cell cooling but your going to lose efficiency at every transition between energy forms. I would lean toward a solar driven absorption cooling simply because it is a well understood technology that avoids several transitions.
Absorption systems can be entirely sealed and may be designed with no moving parts. There are absorption systems that are still kicking after a century of use. What they lack in refinement they more than make up with simplicity and endurance. Picture a multi-facet plate solar collector that runs any time there is sufficient solar energy to boil ammonia out of a water solution. As small system might average several ounces an hour for perhaps eight hours a day. A quart a day sounds doable for a small footprint and without complications that might boost output.
While this doesn't sound like much it would be delivered essentially 365 days a year, better than 90 gallons a year. Any water used could be fed back into the system by using simple evaporation trays to boost output, doubling or tripling output.
The good news is that such a system/s could produce water without adjustment or input for decades. Just set it up and let it do its thing. Such a system could be a survival reserve. Something you could set up at a remote cabin and let run to make sure you always have some water. The main supply would be through well or surface water and rainwater collection.
The bad news is that even a small system is going to run several thousand dollars. Hard to figure less than thousand if you don't get into mass production, even if you built it yourself.