So, do I get this right: A mightly Adept (Essence alchjemist) enchants something like this...
First, she creates an Automated Workshop (Mechanical Mastery level 60). This will remove the need for any assistants in the enchanting process.
Then an item is created with:
- Artificial Intelligence VII (Mechanical Mastery level 75), This will allow the item to know 12 spell lists up to level 50 and 25 skills with up to 150 ranks (2/level, and with around 220 power points).
- Spellcasting (this will allow the item to cast spells).
- Work Stone (Inorganic Skills level 10)
As spell lists, the item will learn several alechmist lists, including Mechanical Mastery. The item will thus be able to create lesser copies of itself, as well as other useful items. All the owner of the item needs to do for that is to provide the material components, in effect reducing the cost to enchant magical items to half the market price (on the long run, when the initial investment of creating the first item has been paid off).
Creating this item would require a mere 93 days, but training it in all those skills and spells will take about a month per skill, so this might be in the three-year range for everything we want. The market cost will be around 7,347 silver pieces plus the wage for such a high level alchemist training it for three years (at probably around 10 sp per day, give or take, that adds 10,950 silver pieces).
Voilá, we have the magidustrial revolution for just under 20,000 silver pieces, or 2,000 gold pieces, or the price of less than 50 large boats (each of which would be able to carry 3.5 tons, so this is not a ship)!
If anyone finds any errors or oversights in the above calculations, please let me know!