For that type of work as most of it is [b]Security Related[/b]
If you are pulling cable you'll need to have the proper certifications depending on where it is you live not to mention enough insurance to cover any possible legal action bought against you for doing sloppy work.
Forget about the day though as it's not possible maybe over an entire long weekend if you work 16 + hours per day you might get it done properly.
I can understand why they want it done so fast but honestly unless it was originally properly setup and all that is required is running some cable in a new premises it will take much longer than just 1 day.
I would allow that long to pull the cable safely and mount it properly and to the standards required here. But maybe those standards don't apply where you are and you can have fly leads all over the floor like I do for an initial installation of a relocated network before I make the connections on the cable pulled through the building and even then I only do that if there is no one about and I don't have to worry about insurance claims against me for injuries when some ID10T trips over a cable. Of course if you have a cable tester you wouldn't have to do this unless you get one of those [b]trouble[/b] cable runs.
Recently I had to pull 4 runs of CAT5 cable and that took 4 hours even though there was limited access underneath the building I still had to staple the cable up so it wasn't hanging down and getting caught by anyone crawling under the building. On that Job I only used about 150 Meters of CAT cable.
The [b]Day[/b] is possible but you'll need at least 2-3 others to get it all done properly and even then it will be a rush job. You would really need 1 on the Server, 1 on the Duplicating Desktops and even then all the hardware would have to be identical, 1 for the Wireless connection to lock down properly and allow access to those who need it and when they are finished that they could help with the cable and 1 pulling the cable with help as and when people become available. Then you would need all these people to setup the desktops properly as I'm sure that they will not want all e-mail going to just one desktop as well as establishing the Domain and AD as required. Not to mention any Group Policies that will be required.
That's for a sight unseen job it may take less time to pull the cable and it might take longer it all depends on the building and how big it is and more importantly how easy it is to get into the guts of. Of course you could always run that Square plastic along the bottom of the walls but it's not cheap and if the $300.00 also covers materials that would make a large hole in your income.
Col