The short version
In Arizona, a microschool typically operates as a private school or a program serving ESA and homeschool families. Arizona does not license or accredit private schools, so the state does not gate your opening. Your real work is your legal structure, your building, insurance, records, and getting set up to receive Empowerment Scholarship Account funds.
Why ESA is the center of gravity in Arizona
Arizona's ESA is universal, so nearly every family in your area can bring funded tuition. Getting your billing and documentation set up to accept ESA money through the state's payment platform is the step that turns interest into paid enrollment.
Free: the Arizona microschool starter checklist
Every step above plus the current official links, in a printable checklist.
Sources to verify current requirements: Arizona Department of Education (azed.gov) and its ESA program pages, the ClassWallet payment platform, and your city/county for zoning and fire code. Requirements change; confirm before acting.