It's probably not very good, but I threw something together for my a group a few weeks back the day before we needed to start planning stuff out because people were having trouble understanding the system.
I can't really guarantee that it follows all the rules perfectly, as I made in in an afternoon, and there are a few features I planned to add but ran out of time on, and have had no reason to go back and finish.
This was made for exactly what my group needed and not much else (calculate total costs, days to complete, and income modifier). It does let you choose if rooms/teams are recruited in parallel or in serial, as our gm decided he didn't want it to take multiple years for us to finish construction.
The gui is a bit of a mess and exporting to excel was never actually implemented, but I figure I might as well post it and see if anyone else manages to get some use out of it.
I saved all of the relevant stuff (rooms, teams, managers, etc) in an SQLite database that should be easy to edit if more content comes out, and users can save their organizations as an xml file to pass around if needed.
You can find the github here
https://github.com/clandowski/PF_Downtime
or a compiled copy
https://mega.nz/#!Odw3jRyA!slP0ZBBfwqSwjAnjJKbfeWFx1kUjX2nHuswfs9FBpHc
I made this in visual studio 2015, so it probably requires a recent version of the .Net Framework. Not sure if I will actually make any more changes to it.
