I'd only go about repatriation if the loco is actually under threat. Otherwise it's just a horrendous cost that would be impossible to recoup.
Add to that, purchase price if not donated FOC, cosmetic restoration and covered accomodation for same.
By and large people come to steam railways to pay and see something that actually moves and can ride behind.
Steer clear of collecting sundry broad gauge stuff of little use or relevance to a ng line, grounded modern coach bodies are a particular bugbear of mine.
A wee bit misleading calling it the Tralee & Dingle steam railway, seeing as it's never going to extend to Dingle.