Configure WK srv 18 clients est time

Hi,
I would like some help estmating a job. I want to configure a server that already has the os installed for 25 clients. The clients will already have WK installed on them. I only need to configure the server with the clients. I am very new to server client networks and need some help. The server will operate with a Netraid single channel raid card with two Scsi HDD. I am purchasing the server with all components preinstalled including the os. What I would like help with is estimating how long this project will take, what I should consider and be aware of.
Thank You