I completed an early -6 slow build kit in 1991, took 2 years. Just completed a -7 QB in 14 months. I prefer not to drag these projects on for an extended period of time, but rather dedicate the time and get it done. I have to admit that I am not strapped to a normal 9-5 job, and probably have more time available than most. I have found with any big project that working just an hour or 2 at a time can really drag it on. When I go down to my shop it takes me probably an hour to get "up to speed", then I try and work for 8 hours or so. Much more productive! I also try to order everything I think I will need in advance so it is there when I am ready. Things like FWF kits, drop in interiors and pre wired avionics can really speed up the process. GOOD LUCK!
Just got back from Sun n Fun, Great WX thursday, great RV turnout!