if you have only one pole its always a compromise on weight/length, you either end up with something too short or something too heavy....
ideally you want 2 poles for residential
a 18 or 22 and 30/35
yes you can use extensions, but swapping about a few times a day will soon drive you mad.
also a plus of having say an 18 and a 30 is the 18 will get most hammer and be the one you replace more often, the 30 should last you years