The Wizard's Guild is very very evil.

[Chris Goodwin]

Originally Posted by hcobb

An off-the street spell casting job can't assume that there are a large crowd of apprentices standing around doing nothing. WG must charge the stored power rate of $5/point for non-scheduled castings.

Probably more than that even. Just like with any trade professional, if you need someone today you pay a premium. But I think wizards are more likely to barter via the "mana bank" idea I posted in the "Why bother with powerstones?" thread.

House rule that off-the-street castings of more than 4 fat (i.e. an hour's rest) are charged at the stored rate?

Sure. I mean, guild houses do keep powerstones around, and they most likely charge a premium for the ST involved. You can certainly rent a powerstone, but (just like with rental cars in our world) if you bring it back empty they charge you extra to refill it.