Mathematically from a pure wealth maximisation perspective, this is true. Ultimately we came to the decision that feeling tight during our 30s/40s with a young family wasn’t worth it in order to absolutely maximise wealth in what should be a comfortable retirement anyway.
That is attitude to risk and lifestyle views from one perspective though. No ‘right’ answer here!
€11,000 a month ish after tax income assuming 10% pension contribution each. €4,500 mortgage, €1,500 childcare (assuming you only plan to have the one!). Leaves you €5k to live on. It’s obviosuly doable but feels tight for a gross household income of €250k+.