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It's xerascaping btw, not xeroscaping. Autistic gripe of mine.
Anyways, we need more information if you want any feedback of value. Everything from low points in the landscape to aspect ratio can come into play. The most generalized advice I can give you is to go look at what's working in your area. Find the most lush patches of landscape you can in the area and see if there are patterns you can replacate in your landscape.
You can consider planting really drought hearty fruiting crops. For example, Sea buckthorn produces delicious and nutritious berries and is suited for exactly this kind of site. Refer to folk wisdom for non-conventional edible plants that could work on that site. Was there ever an indigenous population there? What did they eat?
Additionally, consider plant successions. If you want to work your way up to fruit trees and such you can't just plop em in. You need to work your way up from grassland, to scrubland, to woodland.
You'll also want to get some shelter trees up asap to reduce the wind, it's going to really dry the site out.
If you want to really turbo-charge it, you need to build the soil with a compost tea. Don't bother trying to bring it fertilize or outside soil. It will erode away instantly. You need to build the soil natively. "The hidden half of nature" have a fairly easy to follow description of the compost tea process in the prologue or first chapter I think, but regular treatment of the soil for a year will put you 40 years ahead in terms of building the site than if you just try to work up to it.
t. ecological planner
