You could get the SLX 25' and 35' extension pack. So just slap on the extension when needed and use the 25' for everyday use to save weight and stress on your body??!!
good call ! Thanks 
How tall are you?
Im just shy of 6ft and using a slx25 would easily reach that window.
If wanting to make sure buy proper equipment and sizes. If you can afford it, you really want to go for the slx range or at least carbon poles buddy. Hybrid poles are ok if you dont fully extend each section to limit the flexibility of the pole. But then your limiting the length and so a waste of money.
Im 6ft 2
Im stuck on deciding on getting a trolley system or a van system? Any advice? Its for a pickup truck
When i was thinking about switching from trad to wfp, i thought the trolley system would be ideal. Especially the purefreedom one as i thought i can adapt this when i upgrade to a van later. However i was strongly adviced that people who go trolley first more likely end up with a van and so skip the middle journey. I did and went straight to a van system. I also use a trolley system for ones i cant park close to, but im certainly glad i took that advice.
I would also give the same advice to anyone who asks me. The van system saves so much messing about. When i use the trolley it certainly adds time to my days work, having to go back and fill it up all the time.
There are ones on here who use a pick up and have their setup in it.