Hi Upstart, it is clear that you are considering your spending and ability to raise/spend further money on home improvements etc which is a great start. It is also clear that you do not want to live beyond your means and are proud of your ability to keep your family life going and your children happy and healthy.
You have your mortgage and credit union loan covered, so I think before you take any further spending decisions you need to get rid of the overdraft. It is costing you money you could be spending or saving to service this overdraft. So I think if you work to pay off this overdraft you will be in a much better place. Can you pay it off st a rate of €300-€500 pm? That would be 15-25 months. Would this be possible? Can you get the two adults and the two oldest around the table and get agreement on this, that daily spending will be curtailed until this is paid off? You may need to take payment holidays for Aug (back to school) and Christmas, but agree to this up front. And then as a family agree where you can find this few hundred every month. Lunches, coffee out, discretionary clothes, pub nights, gifts to others, parties, driving less (can you car share, get others to drive the kids around, get them bikes?). Can anyone get side gigs, (summer jobs, overtime, sat work, dog walking, bbsitting?) to reduce the overdraft to zero. Think of the sense of achievement when this is reached. I would say by then you will be ready for college for the oldest, you will have all your loans paid off and you can use the spare income to fund college, do the house improvements, build up an emergency fund. Best of luck!