I hate people that have your logic. Time=Money. If you are not HORRIBLE AT LIFE, Time=Good Money.
Using the logic above, training slow to earn a small amount of money instead of any sort of loss, is stupid.
Botting gold bracelets I guess isn't terrible, I have done it manually for starter crafting levels on my noob accounts.
If the loss isn't over a couple mill, though, I would just use whatever the fastest method of XP is at your craft level. I'd look it up for you but I'm at work at the moment.