Or fines for short-term renting which make normal rent the more feasible option.

Can hotels start converting their rooms into apartments and start renting out to families? If Airbnb is taking business away from hotels shouldn't this work?

It's not New York with lot of population, skyscrapers, etc. Dublin as a city is not great, like... They are not even prepared for rain.

I doubt your Airbnb will be used 100% of the time. 80% would be more realistic. Renting on Airbnb has a one major advantage over traditional renting. If someone loses a job and stops paying rent it's quite hard to evict him.