Sticks collect and distribute small point loads with some welcome redundancy. SIPs are akin to shell structures that disperse loads continuously and more or less evenly over their entire surfaces. Knowledge of all these properties should be giving us superior buildings by design, not just stick translations. You can save money by working economically with standard panel dimensions to minimize waste during manufacture of the kit. Use balloon framing, especially if you import a SIP-framing crew.
Local guys can do the interior framing.
SIP construction lowers heat loss, which reduces the size of HVAC equipment and saves money. It seems I am always converting stick-built plans over to panels. Most plans are not designed to use the panel sizes effectively. Try to locate mechanicals on interior walls. In Western New York we are competing with stickbuilt shells dollar for dollar right now.