@Margaret-T1 I run into a fair number of STR property managers and many charge around 20% of the accommodation fare as an ongoing management commission. They also typically retain the cleaning fees paid by guests on Airbnb to cover the cost of cleaning and turnover services, so those expenses don't come out of your commission.
That said, it's always best to confirm local market rates in your area, since Dublin's rates can vary depending on demand, property size, and the level of service you're providing (for example, if you're handling guest communication, maintenance coordination, and listing optimization). It sounds like you're approaching this professionally.. just be sure to price in your time for oversight of cleaning and laundry vendors so you're not undercharging for your effort.