Similar age and family setup here.
Agree with the above, while no need to drag every cent out of the bank in a mortgage, you do have a good salary, even on one income. Things will not be as tight as you think; repayments will be €2200, you wont be paying the €1500 rent, and your saving the gap anyway. Somewhere along the way your salary will likely increase another 2% or more too.
250K deposit and 500K mortgage, implies you are looking at 750k property? It is what it is. Put it in the context of your alternatives. The only real question would be do you need to buy in Dublin? Plus, I'd add, yes you do if your work requires you more than 2 days in an office - even a "short-ish" commute is no life especially if its your home and family are around there anyway, the savings will never be worth the family or even work time lost sat in a car or waiting for a yet again cancelled public transport.