Especially the immigration part. You are not proposing to enforce immigration laws (which states cant do) but instead use the Arizona tax code to make sure companies are paying taxes for each employee and hence, can not by definition have people who are not legally allowed to work. Thats clever and is a great idea.
On the tax part, I can see you clearly researched the issues and tailored it to the specific situation in Arizona (My wife is an ASU graduate) . Maybe another opportunity that Arizona could use is develop the solar industry. Large swaths of the Arizona desert could be instrumented with solar panels and that would power a huge part of the state.
As a matter of fact, if one could (not realistic right now but not impossible in the future if we also solve grid issues) cover the size of the Mojave desert with solar panels (about 22,000 square km) it would power the entire United States.. So a much smaller area could provide a lot of power for Arizona.