repaying a loan from family with interest

I am looking to relocate my family from dublin to cork. I currently have a mortgage on a house in dublin and I am lucky enough to have parents who can help me financially and loan me money to secure a house in cork meaning I dont have to go througn the banks. This is not a gift however and I plan on paying them interest on this loan in line with what they would be getting from the post office which is where the money currently is (circa 2.5%). Once we move and sell our house in Dublin we will pay them back the total loan amount.
The overall value of the loan will be around €300k. Are there any pitfalls? Will my parents have to pay tax on the loan interest they recieve? Who should actually buy the house on paper, is it better to have it in their name until we move down and sell in dublin, or does it matter?
I am just worried we will unknowingly do something that results in a big tax bill!

I would not consider putting the house in anyone's name but your and your spouse in your example.

Interest received is subject to Income Tax in their hands. There is no Capital Acquisitions Tax as you are not getting a gift.

There are tax reliefs available but not in this timeframe.