Using Caching Server with Only Two Macs?

I'm currently running OS X Mavericks (10.9.4) on both of my Macs (2008 MB and 2010 MBP). We have a limited Internet download allotment, so I am trying to find ways to reduce the number OS X system update downloads. Someone suggested that I take a look at OS X Server, because it has a Caching Server, which would download the update once and install from a local location when other Macs updated.
Given that I only have two (2) Macs, and one of those would have OS X Server, would that work for me?
Or would the fact that one of my Macs would be running OS X Server make the updates to it incompatible for my other Mac? If that was a problem, would installing OS X Server on both Macs, but only running the Caching Server on one of them resolve the issue?
I don't need OS X Server for anything else.
Thanks!
Bev in TX

We have a NetGear router/firewall between the ISP's satellite modem and our computers (my DH's two MS Windows PCs & my two Macs). All of our computers are connected to the network via ethernet cable (wireless network disabled).
My Macs are both network configured with:
     Configure iPv4: Using DHCP
     Subnet Mask: 255.255.255.0
     Router:     192.168.1.1
     DNS Server:     192.168.1.1
MP IP address: 192.168.1.6
MBP IP address: 192.168.1.2
But, I don't know whether those are static or not. I tried switching my Macs' cable ports on the router, but that did not change the IP addresses. I realize that didn't prove anything, though it would have if the IP addresses had changed.
I used to be able to download updates from an Apple support web page, but things are not so simple anymore. I had a discussion about this a while back at in the Safari Community.
https://discussions.apple.com/message/26456050?ac_cid=op123456#26456050
Aside from the suggestion to install OS X Server, a couple suggestions were made for manually downloading or copying a package:
Download a log from an arcane URL; try to find the appropriate update in that log; download the update using the URL in the log file. I can readily see a couple downfalls in this scenario:
The arcane URL could be changed, so that I would no longer know its location.
I could easily select the wrong update from that log file.
Do the update on one Mac, watching folder /Library/Updates to copy the downloaded package. However, that package would automatically be deleted by the system, so I would have to be able to do the copy prior to its removal. I'm not clear as to how this would work, given that the download and installation are automatically performed, and I have no indication as to when the former ends and the latter starts.
In either case, the downloaded packages would not make any suitability checks, so I could easily mess up a system (though it would probably not be likely if I keep my Macs OS synchronized). Still a trashed system can be a headache even with good backups, due to the time it would take to restore a system. That's why I considered going the OS X Server route, but I know about zilch when it comes to networking.
Bev in TX

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(72969)

Using Caching Server with Only Two Macs?

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