I wish I could have out door speakers (really really do would make things easy) but this is not the case. However my "WIFE" has a train of thought along with budget that Im not messing with. I just messured exactly and from living room to edge of the furthest chair from the furthest speaker is 86 ft.

Again my 4 level split has a width of 16" with a wall between the livng room and the kitchen (following the outside door and deck) this wall cover half the width west to east (system is setup on the westward wall with the deck door in the northward postion.