@Trip Great, thank you! I shall continue with my ghost hybrid as the heir.
I actually just went through my spreadsheet and my notes and calculated the full number of vacation days I've used, and based on my count, I
think I'm actually okay. The problem was that a couple of previous heirs came along on gen 5's vacations, and I only counted those days once, not realizing that
each heir that came along was using up a day. When I discovered that I'd been miscounting, I kind of assumed I'd failed since my gen 3 heir had come along on all of gen 5's vacations. But then I took the time to count up the days again, counting all heirs, and I actually stayed under the limit. I think.
Here are the numbers, as of the completion of generation 5:
Gen 1 had 7 days available and used 3 (with spouse).
Gen 2 had 11 days available and used none.
Gen 3 had 18 days available and used 8 (2 days with spouse, 6 days solo).
Gen 4 had 17 days available and used none.
Gen 5 had 24 days available and used 17 (1 day with 2 previous heirs; 7 days with 1 previous heir).
That's 28 days total for the first 5 generations, with 17 of those days happening during generation 5.
It's very possible that I'm still misunderstanding the rule (or can't do math) and have indeed failed, so definitely let me know! After the initial "aw shoot I think I messed up" moment, I
stomped walked away from the game for a few days and only just now took a closer look at the numbers. Hopefully I'm in the clear but either way I plan to continue the story.