For perspective.

I lived in a, what you called, partial IHS for over a year.
Its hard but its doable and I am really glad I stuck to it. Didnt buckle after this board put me straight.
Slept in my bed and XW in a cabin/shed outside when she was here (50% living with OM).

Me: 34
Stbxw: 30
D:5 D:3
Mini bd: May/June 2019
Married: Aug 2019
BD: 6th Dec 2019
OM Confirmed: Feb 2020
March 2020: I filed for D
Waiting for D to be finalized and W to move out end of January 2021