Hi Darren,
Hopefully Daz will come on soon.
He has freedom trolley and used as that (trolley)
But the converted to van mount.
Can't go wrong with that trolley, bit dear for what it is but tough as old boots.
I have had a freedom trolley for 6 yrs.
Converted over as van mount in march.
Can't belive i was so silly for so long

Still use barrels; because my ro setup is at my parents place and no off street parking so load barrels on, leave trolley on board.
I have 100 metre hose and caliber reel from Gardiners with connection kit comes to about £100.
Pulling trolley around was killind my back and knees.
I think Adepta (pure freedom) trolley setup is ok-that's what i did I upgraded ro to 200 gpd system produces about 25 ltr an hour slow i know but i have 600 litre static tank in parents garage use about 150 ltrs a day 6 barrels. (so always have 3-4 days water ready)
I use fan jets and aqua-dapter on pole to save water.
As for a pole i'd start with a 22 or 27 ft clx (gardiner pole systems) and fit an aqua dapter.
I wouldn't go straight for slx (gardiners) as costly if you brake; practice with cheaper clx's.
Forgot to say adepta fit van mount systems and very helpful as is and does gardiner pole systems.
Lee