I'll just list a few points for you to think about
- Do you need 5 feet of gas line per keg? Length of the gas line isn't a factor in balancing the system to the best of my knowledge, so you're flexible in using whatever length best works for you (on the gas side.)
- Do you ever plan to have any beers at different pressures? Some folks like to server certain styles of beer at their "proper" pressure for that style. If you'd like to do that, you're going to need another regulator.
I can't comment on the faucets, as the links don't seem to be working