Our joint income is over £3500 a month, after tax. Our mortgage, bills and food costs £1500 a month.
My husband thinks we can't afford a child because childcare about be £1200 a month (for 5 days full time). He thinks £800 is not enough disposable income. He loves to spend money but I doubt many families have more than £800 disposable income a month. If we had a child I would want to reduce my days to 4 days but that would be a bigger drop in income which he isn't keen on.
The £800 would have to pay for car insurance (about £500 annual), clothes, days out, anything else needed etc.