DURING AN APCH TO LAND ON RWY 30, THE OWNER/PIC INITIATED A SHORT FIELD LANDING. THE WIND WAS REPORTED TO BE FROM 300 DEG AT 15 GUSTING 25 KTS. ACCORDING TO THE OWNER, THE AIRCRAFT ENCOUNTERED WIND SHEAR ON FINAL APCH & STARTED TO SETTLE. POWER WAS ADDED, BUT THE AIRCRAFT CONTINUED TO DESCEND. SUBSEQUENTLY, IT ROLLED TO THE LEFT AS THE LEFT WING HIT TREE TOPS, THEN IT NOSED OVER & IMPACTED THE GROUND. THE OWNER'S INSTRUCTOR PILOT (CFI) WAS ABOARD, BUT THE OWNER WAS CONSIDERED TO BE THE PIC ON THIS FLT.