The property mogul — on a three-day visit to inspect the Doonbeg links — said he would redevelop the protected dunes in an environmentally sensitive way, amid concerns for a microscopic snail.
Mr Trump said he would double or triple his initial €15m investment in Doonbeg — secured earlier this year at a knockdown price after financial trouble and severe erosion saw the asking price slump.
The billionaire said he plans on creating a golf circuit from the Greg Norman-designed Co Clare course, to the Open Championship course at Turnberry and on to his resort on the Menie Estate in Aberdeenshire in Scotland.
“Turnberry will be part of the Trump Triangle as we call it. And the other is my course in Aberdeen — literally a straight line from here to Turnberry and on to Aberdeen,” he said.
“We are already in contract for an incredible helicopter that will connect the three dots with guests and we think that is going to be a tremendous amount of business.”
Mr Trump said hundreds of jobs will be created through his investment in Ireland.
“I don’t have enough time left to do the boring ones,” he said.
“This is one of those that is going to be truly iconic. This is going to be one that Ireland is going to be extremely proud of.”
The businessman flew in to Shannon Airport on his Boeing 757 jet emblazoned with the logo of Trump International, along with his two sons, Donald Jnr and Eric, and his daughter, Ivanka.
He was met at the airport by Finance Minister Michael Noonan and Clare mayor Joe Arkins and other officials.
Mr Trump said he has been contacted by organisers of the Irish Open and European Tour bosses to discuss holding tournaments at Doonbeg.
After initially being served with a stop work order, the New Yorker last week got the go-ahead for protective works on dunes on the course, now known as the Trump International Golf Links and Hotel Ireland.
He is also preparing to apply for permission to put in boulders to act as breakwaters in a bid to prevent further erosion of dunes, swathes of which were devastated in winter storms.
“It was a 200-year storm, you all know better than myself, people who were here said they have never seen anything like it,” Mr Trump said.
“Ideally that won’t happen again. But it was a lot of damage but without that damage I would not be standing here right now, it was one of the reasons I was able to get it.”
Doonbeg, a renowned beauty spot on the Co Clare coast, is protected by strict environmental concerns for a microscopic snail which has been around since the Ice Age — the narrow-mouth whorl snail, or vertigo angustior, which measures about 0.9mm wide and 1.8mm in height.
Mr Trump has said that he will work with environmental experts in any redevelopment.
“The snail issue is an issue that will roll on and one that we will be very protective of,” he said.
“It’s a special piece of land and we are going to do it in a very, very special way and we are going to do it in a very environmentally sensitive way. It’s very important to us.”
Mr Trump has hired golf course designer Martin Hawtree to work on Doonbeg. Repair work will take place over the three months with further redevelopment planned for the next year.
“It did suffer greatly but most of that has been repaired at a much higher level than it was before,” he said.
Mr Trump also praised council chiefs who he said had “killed” plans for an offshore wind farm in sight of the golf course.