I hope that when the newswire says that the “new railroad museum and will feature a model railroad layout built over a span of 50 years” it means the layout will feature model trains of prototypes and not that the layout will take 50 years to build. Of course I would not be surprised if it does take 50 years to build if it is a large layout,
http://www.trains.com/Content/Dynamic/Articles/000/000/005/638bdjha.asp