Upkeep increases by 1 per 5 subjects the effect is being applied to.
(First 5 do not incur increase)
1 - 5 -> 0 upkeep increase
6-10 -> 1 upkeep increase
11-15 -> 3 upkeep increase
With GM Med/Focus and 120 prov/ peace, I can run inspire OR invigorate indefinitely, or both concurrently for about 4-5 minutes.
1