I like the idea of micro-schools especially:
Those who want to cut loose administration entirely, and run their own "micro-charter" -- which could be as small as two teachers and, say, 40 kids. Let's make up some numbers. A number of large cities spend $15,000 per student per year, and often allocate charter schools 20% less. So let's work with a number like 40 kids * $12,000 = $480,000 annual budget.
If two skilled buddy teachers chose to run their own little "log cabin school," they would: pay an organization to manage the "back office" stuff (everything from insurance to payroll to inspections to compliance); rent two single classrooms from a church; buy supplies and books and computers off Amazon; maybe snag a couple of student teachers from a nearby college; and perhaps pay themselves $100,000 per year.