My Kingmaker group is nearing the end of RRR, and I'm wondering about magic item availability going forward. Normally I don't restrict magic item access much if there's a large city around and we aren't using ABP, since game balance depends on the players regularly upgrading their gear. However, Kingmaker makes this a bigger question by explicitly capping a city's base value at 16,000gp in the Kingdom Building rules.
Clearly, those rules say that a minor cloak of displacement (cost 24,000gp) will only be available if it's rolled randomly in magic item generation. However, what does this means for enhancing existing magic items? Can a player have his +2 longsword (cost 8,315gp) upgraded to a +3 longsword (cost 18,315gp) by a local vendor?
It seems crazy to say that someone in town can create a +3 longsword by random chance, but can't improve an existing sword in the same way. On the other hand, the starting items for the Big Six are all under 16,000gp, so if they can always be improved, the magic item availability restrictions don't seem to mean much.
None of my 6 PCs (currently lvl 6) have taken any item creation feats yet, nor do they seem to have any intention of doing so.
What have you done in your Kingmaker games? How has it worked out?