Excellent article! It's about time we had some stronghold rules, and these strike me as just the right balance of detail and abstraction. And I love the fact that we now have actual rules for making flying and extraplanar strongholds!
I'm a bit skeptical of Bigby's Construction Crew; after the initial investment, it lets you churn out new strongholds at 1/5 normal cost, which seems a bit much. I'd be inclined to reverse the market and component costs, so it's 5K to learn the ritual and 20K to cast it. But that's a minor detail.
You can still do that in your game, that is why we have DMs. I think the strength of the article is that it gives a flavourful but simple way of calculating the cost of a stronghold that does not require a calculator and autocad.
It also give good examples of flavourful rituals.
That article shows what i want from DDI - short, concise articles i can read in a couple of minutes and are easy to expand. DDI has to stop trying to be two magazines and do what we need in todays day and age: small, flexible chunks of information.
Modifiers could be a little highter, but i'm already looking forward to "Strongholds II" or perhaps a campaign-world-specific article about Dark Sun strongholds etc.
I also dislike skill DC's that vary based on the level of the person attempting the skill, and I find it odd that the article goes back and forth between set DC's and DC's that vary by level.
I'd have XP'd you for this one if I could have, but alas...Yeah, that narmed me, too. Like some overzealous editor got halfway through changing it from one to the other and then got distracted.
I also find it a little wonky that a PC is expected to sink so much GP into construction when GP is such a closely moderated resource. I mean +3 armor, or a castle that gives me a non-staking +1 to some CHA checks on the off chance the DM happens to let me make some CHA checks in my castle?
That's kind of a problem with GP in 3e and 4e in general, though.
I do like the article, all told, and it gets me thinking about giving out strongholds "for free" to characters just as a lark. Not sure I would use the rules therein, but it's a useful story item to consider, and I like that there's an article for considering it.
I'd have XP'd you for this one if I could have, but alas...
I agree with the 'gold moderation' being problematic in this case. It's also why I don't like the way stock ritual rules went and overhauled them for my campaign (they all burn surges, and sometimes gold, depending on the ritual).
This is somewhat mitigated by the fact you can no longer purchase most magic items per RAW. Got to spend that money on something...