I have been divorced 5 years. We both earned about the same, so when we divorced all assets were split 50/50.
Ex and I both work. We have the children week on, week off.
I miss them horribly and wanted to have them as main residence at mine, but so did he, and there wasn't really a strong argument against him.
They visit mine a fair bit and I take them to clubs etc when it's not my week, but so does he. Depends who has capacity.
Neither of us pay anything to the other.
We are both responsible for all costs of our own homes. And any holidays we take them on. School holidays are about 50/50.
We have a joint account, we both put an equal amount in to pay for all school dinners, clubs, clothes, presents, parties, pocket money, etc
I think I am a single mum because I am not in a relationship and financially entirely responsible for my own house. My friend says I am not because my ex does a fair amount.