I agree but again in conversation with others of the same opinion, the concern is that if it was to be tried how long to be up and running and will it once again dilute the somewhat already large market of preserved lines in Nth Wales once it is?
Hence the rather ugly battle between the 1964 Company (For) and the Ffestiniog (Against) about restoring the Welsh Highland. The Ffestiniog was concerned about the impact on its revenues and thus viability. In the end they led the majority of the restoration – if the revenues come to them its hardly going to put them out of business and there are economies of scale (all Loco work at Boston Lodge etc.).
The fight was quite nasty and there is still a lot of ill feeling around about it in some quarters.
I worry about the 1964 Company (now the Welsh Highland Heritage Railway) but they have set themselves up, whilst still a separate organisation, as the 'Museum Department' for both the Ffestiniog and WH (the Ffestiniog turned their rather small museum into a bar) with exhibits on loan from the Ffestiniog, original and original style carriages and a station that tries to recreate a 1920s WHR station as exactly as they can (down to the type of washers used to put together the 'Tin Shed' station building).
BTW the Bowes Railway have two Inclines working if you want to see one:
http://www.bowesrailway.co.uk/ From the Foxfield website that wagon is a 1907 Railway Clearing House 'Private Owners' wagon from Wolstanton Colliery, the worst one of three. '... now almost unique in the UK ...'. '... require extensive timber replacement but the metal components are generally in usable condition'. '...it is hoped that at least one or two of them can be restored eventually, to carry authentic "Foxfield Colly" or other local private owner wagon liveries.' I would guess that this one would be used to donate parts to get the other two up to scratch.
Rick