In a run of Jade Regent, my party skipped around a bit; we had several new players, and everyone agreed this was the best way to go. The party that completed The Brinewall Legacy went no further in the campaign, but now that the group has gotten their teeth into the mechanical aspects, they want to go back and revisit the original, overly-complex-for-new-players PCs they had originally rolled, and we're advancing Golarion as though the entire AP had been completed.
I'm far more a fan of the 3.something Stronghold Builders Guidebook that the materials presented by Paizo for this type of task. If the PF rules were in place, and the above applied, did it seem to work well? If it didn't apply, or didn't seem to run smoothly, do you see the validity (and mechanical wealth aspects) from the SBG meshing well with the PF system? Unusual magical devices aside or converted to meet modern spells.
You could play it as a modified version of Kingmaker - depending on how willing you are to alter the local geography to comply.
You could play it as a modified version of Kingmaker - depending on how willing you are to alter the local geography to comply.
Sounds like a good plan.