Not really advice but my experience and my opinion is this.
For years I have totally compromised my home arrangements and jobs in order to be like clockwork for the contact time that I have scheduled.
Sometimes the logistics of making that happen were a nightmare… inconvenient and expensive… sometimes nearly impossible.
I don’t regret any of it and I’ll continue to do it. You only really have 4 and 3 years of being a ‘full scale’ dad left, after that they will go off and do their own thing. For that time I’d just make whatever compromise you need to make it work (making sure you don’t resent it) and enjoy it to the full.
The issue of finance etc is pretty difficult and the system isn’t fair. It’s just another pill you have to swallow to make it work.
You’ll never be sat in your old folks home regretting the choice to spend these years with your kids.
There’s no bigger compliment than them wanting to stay with you