@calico the only dealer that I know of is in Ballymena and they do Singer, Pfaff, Elna & Janome according to their website. You can get a train.
You'll read on here "I have no shop...
the closest one is 30,40,50 miles away. When we say we have no shop...WE HAVE NO SHOP! The end.
With that budget I'd be tempted to go to the mainland and visit one of the big suppliers (SMD) over a couple of days. I'm sure someone must have done that. Good luck.
And if you hear of any dressmaking classes would you let me know please. We have none of those either.