Narf's Mod: Almost done shredding the Facility.txt. Basic stuff only.

[minipol]

Is there going to be cheese and giant mice involved?

Anyway as for your question, i think it's to early to tell what will be a good settings for the advancement percentages. You will have to play test it to balance it out. I would go for 10% but as i said, the effectiveness of this will depend on how fast people can build these cheap units.