Jim, I haven't finished my 7SS yet but my model 4 took around 1,200 hours to complete but I had many mods from stock that added time to the build. I did it in 14 months of pretty steady effort. I don't think the model 7 SS would be much more if you kept your Kitfox simple. Lots of high timers are building the fanciest versions with all glass panels, auto pilots and the like.
Advertising a universal build time for all situations is tricky. Just know that it varies for all kit manufacturers as they control nothing about your shop, it's equipment set up and your skill level. I think a needle, ball and airspeed model 7SS with a know engine like the Rotax is doable.
Now with that said, if you're going to invest your valuable time and financial resources in a kit built aircraft, don't you want the best one available? And where else are you going to get all this free support from all these good folks to help keep you on your time table and budget? Order your Kitfox 7 SS and never look back. You'll never regret it when you see the quality of the kit and the build manual.