So you did some construction in your younger days and can tell from the information you have that the engineers, city planners and project managers are wrong on the project they dedicate all their time too. Gotcha. HF gold.
Here in BC I worked on a couple project that were built on empty land and the land was the biggest problem. I am talking from personal experience. I have been to Arizona and posters who actually live in the state can correct me, but not all land can be built in that easily. I worked for a project that was suppose to be only a 3 year build, but took 7 due how the land was not perfect and it cost the biggest delays.
NO one knows for 100% just what kind land it is. They have done studies and have come to some conclusions. For the development, from what it looks to me, they may need to dig down between about 20 to 60 feet and until you actual start digging? you will not know what you have to deal with. This is development 101. You do not know for sure what you up against till you start digging and this is a pretty big dig.
How much development and construction have you done in your life? They are building a massive project where there is absolutely nothing. From what I have seen, there is nothing there and they are starting a massive project from point zero.
Even though it is empty or barren? That does not makes things easier? It in fact makes it harder.
I have been to Arizona and believe hockey will work there