I like to see different color evergreens. Would suggest 2 Arizona Cypress - bluish green foliage, drought and heat tolerant.

Prickly pear cactus - type that gets several feet high. We have them in Texas. Some are bluer than others. Drought/heat tolerant. Our bigger ones seem to be nearly stickerless.

Maybe a Yucca or two - drought and heat resistant.

Afghan Pine seems to do well in hell. Probably do well there also.

I like Junipers just for variety and they can take the heat and drought pretty well. Even Virginia Juniper will grow there if you water it some, but there may be some native varieties available. If so I would choose one of them.

Would throw in a specimen Palo Verde tree (12-15 ft tree with yellow flowers) also or maybe Mexican Poinciana (4-6 ft bush/tree with yellow flowers). Both are tolerant of very high heat and low water use.

Have to have an Agave. I like the gray/blue one best. Whale's Tongue is my favorite but I like just about all of them!

Maybe a large rock or two to break things up some. Use different colors from wall.

Post a picture when you finish. Good luck.

What are you going to do with the space inside the wall? Is most of it going to be a garden. with large beds where trees of some height can be accommodated? At least near the wall?

Also "affordable" = what, specifically, in this instance?

No clue on plants for your landscape, but you might consider building an arbor along the wall and covering with vines. It would provide some shade, and the ‘roofed in’ feel might make the warehouses have less impact?

Eucalyptus, but not trashy E. globulus. See this grower's list of trees for AZ. Also suggest you post the question to the Arizona gardening forum.

Visit a local garden center for plants that will work in your area.

Hi Dani, as beautiful as Palo Verde trees are, they are also almost too common where you live. We completed a project in 2016 in Mesa and Palo Verde trees were planted all around the subdivision that our client lives in. So instead we chose the following three trees for the design:

Caesalpinia cacalaco (Cascalote) - the fruits make this tree interesting and it still has yellow flowers like a Palo Verde.

Chilopsis linearis (Desert Willow) - Gorgeous, large flowers

Olneya tesota (Desert Ironwood) - native and hardy with spring lavender flowers

Photo shows the ironwood along with a cascalote in the foreground. Hope this helps!

James