Ant French is a genuine newbie IMO - look at his FAQ page - no seasoned windy would offer those services - turn up at a set time, join his rainy day club, collect on Fridays and can't do above a conny.
And he can't spell either!
Ant - me old china - listen to yer old uncle gormy - get a tds meter; get a back pack and 20ft pole now. Get 4 x 25L barrels. Get a 200gpd ro-man type R/O and get a 225L water butt. Sorted.
Don't get a ladder, don't get a roof rack don't go trad.