Hi there, I've just started this challenge as a break from my 4x4:) After reading all the rules I've just had two things not too clear with and would like to make sure:
Is extending (i.e. fountain of youth) or shortening (i.e. age of instant) ok for townies which I consider as potential spouses?
The travel days post University Life...I am not too sure what is the difference from pre-University Life? I can see all heirs can travel for 7 days only or is two terms in University possible?
1. You should only extend the life (or shorten it, I guess) a sim that is or will be your spouse. If you have a few potential spouses, you should pick one and use the necessary potion/method and marry that sim. That's how I did it in my first attempt when I found a female vampire that was an elder. I picked her, married her and then used the fountain of youth elixir to make her a young adult in order to try for a baby.
2. Each heir can only travel for 7 days, but the days you don't use stack. So, your founder doesn't travel at all, for example. That leaves 7 days unused that you can tap into for Heir 2 if you want to send them to university for two terms or 14 days (the 7 unused from the founder + the 7 days that you Heir is already allowed). So, in order to send one heir to university for two terms, a previous heir must sacrifice their traveling privileges.
At least, that's my understanding of the rules for these situations.