Air B&B

Honestly for just a month it might not be worth it. You will have to pay tax on the income at your marginal rate whether it's enough to put you over the threshold for self-assessment or not, so if you are already on more than €42k that's about half your net profit gone right there. You'll also have to hire someone to turn the place over between guests, meet your guests, and handle any issues that come up, since you'll be out of the country, so that will cut into your profits a fair bit. Then there's all the time involved in setting up the AirBnB listing (which also has its own fees) and filing all the paperwork to register your property with the council for the planning permission exemption (and possibly registering with Fáilte Ireland as well, if that system has been brought in by the time you're doing this). Unless your place is in an area where there's a lot of demand for your type of property and you can charge a premium, you might not be making much in the end, and there's always a risk of getting a bad guest who will leave the place a wreck or annoy your neighbours with some big noisy party.

If you're doing a single rental for 30 days, you wouldn't have to register for either, as that wouldn't be a short-term rental by their definitions (14 days or less at a time for planning purposes and 21 days or less for Fáilte Ireland). The tricky bit might be finding someone who actually wants to rent your place for a full month but only a month.

It could be a bit risky, as well, because a good chunk of your potential market for that kind of rental would be folks just moving here or getting booted from their current long-term accommodation, rather than tourists who are definitely just here for a temporary visit. When they find out that a month actually isn't long enough to find affordable long-term accommodation, there's a risk they might not leave at the end of their booked stay, and getting them out could become a huge hassle if they decide to claim they've a tenancy rather than a license agreement.

I wouldn’t consider renting my home for a month unless the Ryder Cup was over my back wall and I was getting €20k rent! The potential downsides are just too high when compared to the upside.

You must be in Dublin 4

I have a friend who does airbnb (well its a mix of similar sites he uses. Dont think he does much with airbnb anymore) and he was telling me that he can see all of the previous reviews that the guests got before accepting them. He then only lets to couples, or couples with one or two kids, who got top reviews and who dont give bad reviews themselves. He never lets to people with only a few reviews or to groups or anyone who even got one bad review from a host.