Yes, firstly, that site was not then available. The study was done some ten years ago.
Secondly, the terms of remit were related to a 5'3" gauge set up, very much along Downpatrick lines, within a 45 minute drive of Dublin, as such a market is essential to any 5'3" gauge project if it is to be financially viable without external help from either a funding body, local authority, tourism body or private individual(s).