Hypothetically I got my 7ss base kit ordered for $26k and change. Then I ordered a Rotax 912 ULS for $19k and change. What costs above and beyond that is it going to cost to finish the plane? Fabric/firewall forward/etc etc. I know avionics can be $$$ or $$$$$ depending on what you want to put in. Say you keep the avionics pretty simple with maybe some steam gauges and some sort of economy GPS system. I wouldn't expect anyone to throw out exact figures but just a ballpark idea would be great to know... $10-$15k, $15-$20k, $20-$25k above the airframe and engine?? I tried looking back in the forum posts to see if anyone has addressed this in the past but didn't see anything. Appreciate any insight!