I would appreciate advice on the following situation

I have several hosts of differing architectures or peripherals in a
training room (several training rooms actually but each are independent
of each other) which are supported by a server running the standard *NIX
network services DHCP, BIND etc. The server also has the training
application (which is single install license but multi-user) installed
on it .

How should this training room be best implemented for reliability and
ease of maintenance ?