Probably somewhere around $200,000/year as a high water mark. That works out to the average cost of maintaining one person, plus 2x the average household income

Probably somewhere around $200,000/year as a high water mark. That works out to the average cost of maintaining one person, plus 2x the average household income, which seems like a good proxy for the fully-loaded cost of maintaining a full-time staff member and associated infrastructure. Economies of scale suggest to me that at scale it should be possible to support a ratio of staff:inmates that is less than 1:1.