In Canada a homebuilder does all his own maintenance. And the non-homebuilder that buys it from him also does all his own maintenance. Most responsible owners know their own limitations and we don't have endless homebuilt crashes. In fact, most aircraft-failure accidents seem to be a result of poor assembly of the airframe or fuel systems, and those tend to crash very early on. The rest of the accidents are due to the same reasons TC'd aircraft crash: carb ice and its mismanagement, continued VFR into IMC, fuel exhaustion, loss of control during takeoff or landing or unauthorized aerobatics or botched forced landings.