Yeah, for a house you want a ladder or wfp. I’ve used extension poles on 2-2.5-3 stories and it’s a pain in the butt and you had better be a gorilla ninja with that pole. Oh, and watch your thumbs when you collapse that optiloc because it WILL take a nice bite if you’re not careful.
The trick is that with some windows you can tilt them in and with sliders you can remove one side and clean the window from the inside. If they’re older windows, use a ladder because it can be a royal pain to try and tilt close old windows and sometimes old sliders will not play nice.
A nice 24’ extension ladder will get you most homes but 3 stories might be a stretch and you might need a 28 or 32. Get the 32 if you’re going to do gutters.