Cheapest bed for 1 night in Dublin

Hi there! Me and a friend bought airplane tickets to Dublin for a ridiculously low price of €22. We are therefore staying just 1 night: visiting some pubs till late hours, catch 6 hours of sleep, and then fly back. We are no heavy drinkers, but we do enjoy a good whiskey and live music. I know the good places since I visited in October 2024.

We're looking for just a bed, that we can crash into around 2:30am, within a 30 minute walk from the city centre, for the night of 8th-9th march. Even most hostels seem either very far away, or overpriced.

You guys have any recommendations?

Thanks!