Tyson A-60-G is literally just industrial tubing. I imagine you might be able to find a more generic, less expensive EPDM style from a local hardware store, so it's worth a look. And such a tubing would be easily maintainable. I don't know if Ace actually does, I'm just suggesting you take a look though if the goal is "cheap" and "lots".
Yeah I've never used car antifreeze and distilled water, so don't really know the "right" ratio. I imagine a 25/75 or even 80/20 would be fine. You don't want too much glycol in there to slow the flow rate.
Faucet attachment? Probably, nothing I know about unfortunately.
Y splitters can either be an actual Y-splitter or something as generic as a block with three G1/4 opening such as this:
Alphacool G1/4 Round TEE Connection Terminal - Black (17030) ModMyMods.com - PC Watercooling Parts and Accessories
MODMYMODS.COM
Alphacools's fittings go new ways in looks, quality of manufacturing, colours and choice. The inner diameter of these fittings truly deserves the „high flow“ attribute! The first three colours, Chrome, Deep Black...
Or you can do more traditional actual Y-fittings such as this:
Alphacool G1/4 Revolvable 45° Y-Connector - G1/4 - Black (17063) ModMyMods.com - PC Watercooling Parts and Accessories
MODMYMODS.COM
Alphacools's fittings go new ways in looks, quality of manufacturing, colours and choice. The inner diameter of these fittings truly deserves the „high flow“ attribute! The first three colours, Chrome, Deep Black...
Alphacool G1/4 Revolvable Y-Connector - Black (17066) ModMyMods.com - PC Watercooling Parts and Accessories
MODMYMODS.COM
Alphacools's fittings go new ways in looks, quality of manufacturing, colours and choice. The inner diameter of these fittings truly deserves the „high flow“ attribute! The first three colours, Chrome, Deep Black...
With either style, yes you'd need 6 compression fittings.