You will not be able to buy a house until at least 5 years after you have paid off the judgement mortgage.
You should speak to a Personal Insolvency Practitioner as you are insolvent.
They might be able to negotiate something on the judgement mortgage. If you can raise some cash from the family, the creditor may accept a much lower figure in settlement.
If not, you are in Negative Equity of €70k so you are a long way away from buying a house.
However, you have a very good investment.
The rent is €14,000 per year
The interest is only €6,000
So you are making a profit before other costs and taxes of €8,000.
So hold onto the property.
Avail of the free accommodation and use the money saved to pay off the judgement mortgage.
Brendan