Both solutions are expandable, and the disconnects have nothing to do with it, other than increasing the price.
Phantom accounts posting malicious claims, bagging out the opposition, and fake product reviews deserve to be applauded? No my friend they need to be identified and abused, I call it the way I see it, there's no PC here but if you see it differently then that's fine.
As for the tee piece for your other project there's this for $45
https://www.keg-king.com.au/2-inch-tri-clover-tee-extension-female-1317.html or this for $19.95
https://www.kegland.com.au/2-inch-tri-clover-equal-tee.html now they certainly do look a bit more apple-ish.
And your simple rims @ $210 just tube no element etc
https://www.keg-king.com.au/catalog/product/view/id/184/s/rims-heat-stick-heat-exchanger-housing/ could be a complete pro unit
https://www.stilldragon.com.au/rims-tube-complete/ for an extra $65 complete, even comes with mounting brackets, and I can attest the quality of this gear, I happen to still as well as brew. The Still Dragon stuff leaves KK/KL stainless for dead, although the KL gear is substantially cheaper so as you point out "Depends what you want" Cheers G