Can I only craft one item at a time?

No, the crafting itself does take time, but a queue of items can be set up to run while the character is running around, performing more immediate tasks. Most items can be created in only a few minutes, though the most impressive, difficult, and expensive creations can require days of effort, or longer! Fortunately for the artisan, there is no chance of failure during the crafting process. If you have the blueprints, the materials, the time, and the skill, you can build it. Note: Scavenger level accounts have only 8 hours of crafting available to them per day.