Hi MM,
The Shannon can get very choppy, so make sure all beverages are put away safely. I would hazzard a guess that Jon at Wayford through his contacts would give you an idea of costings to get it transported there and back.
I personally have not been to the Shannon, but know folks that have. A dinghy is a must to get the best out of your stay there. I find Ireland, well Dublin, to be very expensive to even stay for a few days, so boating I would think be even dearer. I may be totaly wrong on the boating side, but worth a mention.
I wish you well, if you do go there, the natives are very friendly and give you gallons of cold black coffee with a creamy top on it
Iain.