Julianary,
You could well now be caught on 20% deposit rule.
Means you need k11 as deposit.
For clarity;
1. You do not get (black) marks on ICB for applying or being declined on a loan.
2.I presume you can show ongoing clear car loan payments ,that is a plus.
3.The slow student payments may well now be cleared from ICB system.
Go on-line to Irish Credit Bureau and apply for your own ICB report.
At least then you will know where you are on ICB.
4. Your father sounds supportive ,so maybe with family help you can get round this, because from your post this loan makes financial sense.