Ourph said:
GEEZ people, lighten up! I'm not using "mother may I?" in a pejorative sense. I'm saying that there's no difference, from the player's perspective, if the NPC takes 2 months to make the +1 sword because "he just can't get around to it" or if the DM's houserules say that's how long it takes. It's still the DM deciding for the player when that magic item is available. I DO NOT THINK THIS IS A BAD THING (as some of you seem to have assumed). I think any responsible DM does this.
Actually, there's a key difference here: If the DM's house rules say X, the player has presumably seen these houserules. And even if the DM creates the house rule for X right on the spot, then they will presumably be part of the house rules from now on.
In either case, there's a predictability there: The player knows what to expect and can plan their actions accordingly.
In a mother-may-I scenario, the player doesn't know what to expect: Any time they go to get an item crafted, the waiting period will fluctuate at the DM's whim. The success or failure of their plans will depend on whether or not the DM likes the idea of them having item X.
Now, in the specific example you've proffered, there's considerable gray area: It's clearly a mother-may-I situation (since the DM is deciding on-the-fly whether a particular item will be available to them on a case-by-case basis by deciding on a case-by-case basis how long it will take them to commission the item). OTOH, it's not unreasonable for a DM to say: "There's only 25 people in this village and none of them know the spells or have the material they need to craft the item you're looking for."
IMO, the question of whether or not this is a true mother-may-I scenario depends on whether the DM is leaving options open for the PCs to pursue: Is he saying "this particular wizard has a backlog of items" because that's legitimately true, or is he saying it because he doesn't want the PCs to have item X?
And that basically comes down to a simple question: Is there anybody else in the world we could go to and get this item?
Personally, as a DM, I use the Community Wealth and Population guidelines in the DMG (pg. 137) as a starting point. But since I find the assertion in that section that every single magical item with a value of less than 40,000 gp should be "most likely" available in a community of 12,000 people (if you do the full math suggested in that section, it turns out that -- just using the magic items in the DMG -- every single person in the town has something like a half dozen magic items). So I tend to use an uncodified set of guidelines which roughly looks at what percentage of the community's GP limit any give item's value is, and then roll some percentiles to see whether it's available.
And I also generally treat magic items, in general, as a class of items -- so the upper limit of magic items available in a typical community is half the GP limit times 1/10th the population. (This value is finagled quite a bit depending on the "feel" of the community -- if it's a highly magical city, then there's more magic available. If it's a rough frontier town, there'll be less magic available.)
Anyway, I'm rambling. And this, like I say, is largely an uncodified "back of the envelope" calculation just to give me a rough idea of what should be available.
Is the Random Town Generation informatio and/or GP limit rules in the SRD? I don't think so, but does anybody know?