Vans estimates 1200-1400 for the airframe and 2000-2200 for the entire kit (Engine, paint, interior, etc).  From other RV-10 blogs I am seeing 2400-3200 as time most builders have taken.  Of course depending on how many modifications a builder does to the plane can make a significant difference to the time it takes.

 

 (6/14/2011)
VS total         27.25
Rudder Total 27.25
HS Total         57.75
Elevator         65.75
Tail Cone        98.75
Tail Assembly 0
Total             276.75