My experience is if you want install hardwood floor in regular rectangle room, you need at least a drill + Hammer and Flooring Stapler + Air Compressor (not have to have but better have), and a Circular Saw. But most rooms are not regular rectangle, so you need a metre saw for cutting floor with angle.
If you install Corridor with Balustrade, you better have both table saw and metre saw and also ruler. It also needs skills and patience. It costs most time in measuring and designing.