Yeah I plan on the install and config to be done before I move it to the brewhouse, but network access there isn't feasible unless I add a wifi dongle, which I am not planning on at this time. I may run a cable to an old crt TV for monitoring through a converter. I just wanted to make sure the old PC wasn't too much of a dinosaur.
The internet connectivity is nice though so you can view it anywhere at your house but other than that its not necessary assuming your having it hooked up to a screen with keyboard/mouse so you can change the settings and view whats happening.
And you can get the WiFi Dongle for about $10 on amazon. you can always add it later... My money is on you wanting it sooner, rather than later.
Edit: I mean, why walk to the brewhouse when you can do it on your phone, or tablet, or laptop, etc.