I was looking at what was needed for us to reach t3 on the embassy. Diplomacy needs another 17 projects to be run, and the recruitment needs another 10 to reach t3.
From what i can see we will need;
19,305 Fleet Marks
510 Civilian Duty Officers
300 Tactical Duty Officers
14,364 Entertainment Provisions
594 Embassy Provisions
That is assuming the projects have the same requirements as the current slotted ones, and they award 1200xp.
Overall it isn't that much difference to what we needed to complete the recent mine upgrade. Personally i'll be concentrating to filling these projects so we can get the embassy completed.