Warning Gold long waffle post.
TLDR: Worth getting if your relative is on board with care and maintenance.
Long version ...

Firstly he is a family member, much older, with shoulder issues. He is a part timer.
An Extreme is much lighter, is much less strain on the body and will snap more easily.
I am nearly 66 and I use an Extreme 20 for all my work. I am part time moving from 3 to two days between last autumn and this autumn.
1. As mentioned elsewhere - put him on lower windows.
2. Get him an extreme - no longer than 25ft.
3. Put a light brush on it. (But one that will do the job on first cleans.)
Extreme maintenance is a must. Closing stiff windows with it is a 'mustn't'. Pressing very hard is a mustn't.
I have used extremes since 2011 for high work and 2015 for regular up to 3 storey work.
As soon as you buy your extreme open it fully and spray it with silicone lubricant (a wax furniture polish works but hey warranty). Wipe it and close it.
Now, if you are giving the pole to just one man (best plan) get him to look after it.
After each job run the pole hose through an old sill towel as he puts it away.
After each day fully extend it, wipe it over with said towel, put your little finger in the hole (ooh err) in the base and wipe any grit away.
Once a week extend it and spray silicone lubricant over it. Wipe it.
Every 3/4 months take it apart, check and renew where necessary stop tape. Get a can of Halfords Clear Lacquer and give the pole two coats, reassemble. Lubricate.
Now. I have had 3 every day 20'/25' Xtremes and 1 x 47' Xtreme.
The first Xtreme broke after 18 months. (No lacquer used)
It had lost eight inches off the second section. I put the top three sections including the broken one in my 47 to replace the top three sections (which at this point were 5 years old - but I kept the best of those sections as a spare).
I bought three new top sections and put them in the fourth section with a new clamp and base thus restoring my 20ft regular pole.
By more careful maintenance but no lacquer I got 2.5 years out of it. It is now my secondary pole with a new no.5 section thus a 25'. Fully lacquered and cared for. Most of it is 4 years old except the base section.
Finally in 2022 I bought an Xtreme 25. The biggest section went to the pole above.
The regular pole is still going at 3 years plus. I reckon another year left unless I am unlucky.
If you explain to your relative the cost of the pole, how only you and he will use it and get him to baby it then it will pay you back in spades.
But they can break for no apparent reason. It's not the end of the world. Just a new section or if less than a few inches cut and carry on the first time.