I don't know if this is possible for you, but there was an old greenhouse on our property, which was re-used to put in more delicate plants. I've got taro and cassava in it, but the thing that has gone 100% crazy is sweet potatoes.
It is hot and dry here. We have a few good summer storms, and once a year, a flooding, or almost flooding rain. But it is very hot, and often windy. We are in the rain shadow of mountains, so they get most of the rain and we are dry. Also there are extremely drying, cold winds in winter. Winter we go about 5 months with no rain. Spring is extremely dry, with most plants dropping up to 50% of their leaves, dead grass and dust blowing everywhere. Rains start anywhere from Nov to Feb, but climate change has meant for the last 3 years, no heavy rain until the end of March (the end of the rainy season), and then a wetter summer this last one, but no deep flood event. Even so, the greenhouse plants survive well.
So I'm establishing lots of windbreaks and shade trees. Leucana grows well, gif the ground is shaded, tipuana tipu, a number of Australian small trees (NOT eucalyptus, which kills other plants) and oleanders. As these are starting to grow, they are modifying the climate somewhat. But not enough for the root crops above. However, at the dump, you may find people throwing away shade cloth. I even knew someone who was pulling down an old shade house. And I have some strips from a pub shade sail that got ripped, so they threw it out. So, if you keep asking around, you may come up with quite a good amount.
Our ABC gardening show had one presenter from the dry tropics who made shade houses by putting in 2 rows of star pickets. She then put poly pipe over the end of one picket, curved it up, and then took the end and put it over the top of another star picket to make a hooped roof. The poly pipe was firmly attached in place by being slid over the star picket. So if you make a row of these hoops (like a covered wagon), you could then attach shade cloth. It might be a bit patchwork, by the plants don't care if it look ugly.