In my experience its all the 'bits' that add the cost (you've got most of them - bars, stem, etc.)
RE coldsetting - depending how well you want it done, its either ridiculously easy or not that hard.
I just did it with a long piece of wood - not hard... but that was only for a few mm's - with 140mm it maybe better/easier just to go down to 135mm and then use a suitible hub.
That's fine for a beater.
In my experience its all the 'bits' that add the cost (you've got most of them - bars, stem, etc.)
RE coldsetting - depending how well you want it done, its either ridiculously easy or not that hard.
I just did it with a long piece of wood - not hard... but that was only for a few mm's - with 140mm it maybe better/easier just to go down to 135mm and then use a suitible hub.