1-80 through crafting? O_o
Here is a good guide, it’s dynamic (tied to current TP prices)
http://www.gw2crafts.net/
You can get 10 levels per discipline.
I found it takes a little bit longer if you put bids on the TP for mats and components (maybe a couple hours?) but you can do it quite a bit cheaper than the guides.
Use the crafting buffs while crafting. Plan carefully and never craft without a buff. And have only 1 character get all the crafting professions (he’ll only be able to have 2 active at a time but you won’t lose levels on the inactive levels).
It really is possible! Not incredibly exciting, but possible.
Sylvari for life. <3