Private investors have paid in excess of £3 million for 22 commercial units which are under construction at Parkwest Enterprise Centre, near the M50 motorway in west Dublin. Don Kavanagh, of Wyse estate agents, says the investors should get yields of around 9 per cent on the units which vary in size from 1,800 to 5,000 sq ft. They will be available for letting from next January at a rent of £7 per sq ft.