Liam Kearns is an accountant / tax consultant and was very helpful to me in setting up my rental property accounts.
He can either consult with you on how to go about doing it yourself or will deal with Revenue on your behalf. He was referred to me by a fellow landlord who has 5 properties and is very happy with his advice.
He was having problems with his computer recently, perhaps better to give him a call - 01 807 1884.
If you want to buy a property yourself, you will need an accountant to advise you of your tax responsibilities. Alternatively if you wish to invest in a property fund, a financial advisor will review your current financial situation, inform you of the various products on the market and offer advice as to which one suits you best.
I can pm you a few people I've used for both of these.