FYI....ESTmep cost data is exposed in Revit. It CAN be extracted by others even without access to your database.
More details here...
http://www.darrenjyoung.com/2019/07/29/estmep-cost-exposed-in-revit/
If you have additional question, post them here and I'll respond as best I can.
Darren J. Young
http://www.darrenjyoung.com/
https://www.linkedin.com/in/darrenjyoung/
