61, never realised that. There were classrooms at school in the 70s that were called prefabs or portakabins but they were very different to what we have now
With regards to vehicles Dapol do the JCB and base toys do a forklift, also there is the trackside ruston crane. Go and see Dave on Tuesday, he always has a good assortment of vehicles. Sheds painted to look like new would do the trick