thank you, Jennifer, for an excellent answer
I have some followup questions.
On ponds. I really want some water on the property for my kids. I'd like to go to the eastern parts of the state because I can get more acreage and there are more available choices. If a pond really is out of the question in the OR/WA dessert areas, then I'll have to look more at the western parts.
Also on ponds, it seems from watching Holzer stuff, that his first answer is always "gotta put in ponds". Ask him if I should get a an Adobe house or a Craftsman, his answer will be "does it have a pond". It is just because he's way more talented at the pond thing than I would be?
fruit trees vs support species. I'm happy to do the 10:1 thing. I also know it would take a couple years to get to bearing age, so I wouldn't want to wait to even plant. Is it enough to plan similar sizes seedlings (or seed as Paul advocates) in these ratios?
last, Arizona climate is a bit different from what we have here in WA and OR. how much does that factor? Portland area gets 39"/year; way more than is needed to grow anything. 13" is about a third of that. 8" is 50% less again.
I suppose my question is a matter of how much is enough for most things? 39" is more than needed. maybe 30" is on the threshold, but you can go down to 20 if you do swales. 8 is enough if you've spent some years adding organic matter and shade. Adding a berm against the wind would give some more margin. Probably not linear. My point is not that I want an exact formula. I'm looking for an idea of how challenging the OR/WA dessert areas really are.
I grabbed these screen shots from
usclimatedata.com
vs
Phoenix gets 8 inches, one of the towns I'm looking at gets 13. Also Phoenix is hotter by 20 degrees in the summer. Given that, does the problem change from "a real challenge", to "it's not too bad if you follow some basic principles"?
Miles