Server admin, On the easy

I have a few servers at home. Just one rack full and I want to be able to manage these easily, without shelling out the money for an expensive KVM switch. I have 8 Windows Based Servers (2 on XP, other on Win Server) and a Freenas box.

Back in the day there was an app called pspdisp (PSP Display) for the psp that I used faithfully. It was great cause it had USB support so connecting was simple. The only thing it lacked was upnp. What I want is an app for Android (PSP or PC) that will act as a monitor via usb. The kicker is that I want to be able to use it on the freenas box too.

If there's no app like this I won't be heart broken I was just trying to avoid getting a KVM switch while having a cool alternative.