This'll probably end up a wall-o-text so here we go;
Buildings:
I assume that when you build something it is going to take a period of time to build, I'd suggest that the materials to build it are gradually used up throughout the construction process so if your stores get raided while you are building the construction halts until you can get your stuff back, also if the regular shipments of resources you are using to provide materials from an off site (and probably more secure) location get interrupted you once again have a pause in construction until you can sure up your supply chain.
NPCs:
A question that's been bouncing around in my mind for quite a while is if you start building a town will NPC characters move into your town or will it only be your hired hands. The more I thought about this the more I came to realize that if there were to be NPCs moving into the area they would need some reason to draw them there, so the question then became will you be able to hire NPCs to work your facilities (like your mines for instance) of course you could use the adventurers that make up part of your party but I'm thinking of this as an alternative. What I was thinking is that you provide work for some NPCs and then they settle in the area around your mine or factory or whatever, after you have provided employment and money to some people they'll want to spend it somewhere at which point either you or (if you don't capitalize on the chance) an NPC might start bringing caravans in to sell stuff to the NPCs and if the money is good you (or the NPC) might build a store and settle down. This is how towns are constructed in real life, and would provide a feeling of actual life to the world
Economy and Crafting:
Now here's the big one what I'd like to see is an actual economy, and by this I mean all the stuff that you find in the NPC shops is built somewhere by someone (either you or an NPC). This means that for that nice armor to show up in the inventory of the shop you like to go to in your favorite town that merchant needs to get it built (or build it) using materials mined or constructed by someone else (and the constructed materials need to use raw materials that are mined or whatever). This ultimately would add a lot of life to the world especially if the NPC guards and armies and whatnot bought their stuff from local retailers, this would result in caravans or self sufficiency being of paramount importance for NPC and player settlements alike, if bandits (or the player) interrupt the flow of resources by looting the caravans going to a settlement they would effectively starve the populace of food or materials which would in turn mean that the overall quality of available equipment and produce there would decrease which would eventually decrease the ability of the people to defend the place opening it up for a force to attack.
Now that's mostly just thinking from the point of view of a character interested mostly in fighting, from the point of view of a crafty or trading type this would provide a dynamic market for your goods to make money off find the people who make something and provide them with materials, for the more scheming type you could engineer a market for your goods by interrupting the supply chain and then when things get desperate enough selling the goods at a higher price.
Conclusion
(It's about here I realized that I wrote an essay
I suggest anyone who thinks my economy idea is far to complex or that it can't be done to go and have a look at Guild 2 as it has an actual operating economy (mind it is an Economic RPG so you'd want to hope it does)
Anyway enough from me, I might update this post later
