Try to hook up with a local EAA chapter. Even if there aren't other Kitfox builders, there will probably be people who have built something similar.

An IFR panel is at odds with keeping the cost low. It would be several thousand more dollars just to make it legal for IFR. To be decent IFR, probably a $10k or more premium over a VFR pane, and the additional weight would be significant. If you are new to flying, you might want to spend a year or two renting to see what your true 80% mission looks like. The Kitfox isn't really the right plane if you frequently need an IFR cruiser. You can always rent an IFR plane if you only need one rarely.

Good luck on your choice. You're at the second best place to get answers to your questions. (Kitfox Aircraft being the best.)