Congressional Budget Office Cost Estimate: S. 3437, Federal Rotational Cyber Workforce Program Act of 2018 [open pdf - 85KB]
"S. 3437 would direct the Office of Personnel Management to create policies and procedures to allow federal cybersecurity professionals to temporarily move from one agency to another for up to one year. The authority would expire in five years. CBO [Congressional Budget Office] estimates that implementing S. 3437 would cost less than $500,000 annually over the 2019-2023 period for new regulations, additional staff training, and administrative expenses. Any spending would be subject to the availability of appropriated funds."
Congressional Budget Office: http://www.cbo.gov/