Eh, it's probably still less work in the long run than figuring out the whole homeschooling thing
(for them, I'm not referring to anyone else who HS on here).
Really, all that needs to be done is Tim gets them up and ready. While they're young, Tim walks them (or drives them) to the front gates, they get picked up by the school bus, and off they go. Then they walk home from the same bus stop in the afternoon (or Tim picks them up and drives them back from the stop). Tim will go out and film from 9 a.m. - 1 p.m. and be back by the time the school bus rolls in around 2-3 p.m. (adjusting for whatever year they're in)... and they can still pull them out for vacations.
Tim will know all the days off, for sure, and that's all the calendar stuff they'll need, aside from maybe a holiday play or something or a start-of-the-year classroom open house... or maybe a parent-teacher meeting, as applicable. (good luck to the teacher)
Jenn can still sleep in and maintain her life as she's living it now.
Jenn can be completely hands off. It's a win for her!