The pitch: Lets face it, there are all kinds of simple magic items that magi want, but don't want to go to the trouble of making. Magic lights, air fresheners (a scented chamber of the spring breeze), or a heater. Everyone wants them but the resources and time is better used elsewhere, unless you make a lab for the sole purpose of recruiting apprentices and making them make charged items. The start up capital is a little rough, you need a few primers and to spend the first year having them read and learn Latin, but the payoff is worth it. After the first year of apprenticeship you have your own money/vis making worker to make magic torches to sell to other magi.
The product: So you have yourself a bonified sla....er apprentice. Now what? Well a magic touch is a level 15 item.
A month by torchlight
CrIg 15
Range: Personal Dur: Moon Tar: ind
(Bace 3 +2 moon)
Now you want these devices to have a shelf life, say 7 years. (x5) to total. Now if you got a couple of good primers, you apprentice should have this total on his own which is a 75 total, or 13 charges. A year and a little bit of light. How much do you figure a magi would pay for one? A pound of silver to not have to go to the trouble of making one himself? The vis and the time expenditure is worth far more than that to make a permanent light source. But wait, you could make a 7 year light source and charge vis, oh yes you can. Level 14 constant effect, 10 pawns of vis, same lab total and boom 5 magic lights that are good for 7 years. Bet you could sell them for 3 pawns each, and grantee repeat business. Get a few more of your fell magi to buy in with their apprentices or hire a few fail ones and watch your vis and silver supply rise.
Really, why has no one done this yet?