Sorry your incorrect you do not see to understand what's on offer
The pump you will not get form the place you say its a piston/plunger pump and it cost more than twice the one you refuring to. if you could get the water to it it would run the system at 200PSI without any issues!
They are not 10" X 2" filter housings they are 10" X 4.5 you would never user standard 10" housing on a system this size.
The Filter your showing are 10" X 2 and would not last 2 or 3 days work! the ones in this are long life 10 X 4.5, I would not put filters of this type in a big system. because you also would not get the flow rate.
Its not a standard inlne tds meter its panel mounted TDS meter,
http://www.tdsmeter.co.uk/products/DualDisplay.htmlYou seem to have forgot the steal welded frame.
You may be able to make a system for less but it will not be like this one or as powerful.
The Membrane and Prefilters are new
Martyn