Do you have any finished pics of the network area?
Yes, I do.
Here is the 19" patch bay, and one of the 19" hubs.
19" hub in AV rack.
This is the front side of the third AV analog rack.
The modem is below that speaker and the mesh router above it and just to the side of it above the turntable case.
From left to right, the AV rack, then the digital audio rack plus a Revox A700 tape machine, then the digital audio editing station. At the end if the turntable case and preamps, with two Revox A77s and Dolby B encoder/decoder and dbx 1 & 2 encoder decoders.
In the bottom of each rack is an uninterruptible power supply which keeps constant voltage and can power from battery for 20 min and then give a soft shut down. There is also a 20 KVA auto start generator so shut down should not happen. There is a surge protector at entry and one in each panel and at the solar combiner. This is NEC code, and you need to make sure this is done properly. As the climate warms and gets more violent, all members should bring their home up to current national NEC. I have spoken to electricians who have been to homes having total wipeout of everything that contains ICs. that is darn near everything electrical in the home, including light bulbs now. Make sure this is done properly.
Great rooms in general present problems installing AV, due to lack of wall space. I did not intend a system for our great room, but my wife insisted, and ordered it take no floor space! In our last home there was absolutely nowhere to put and AV system in the great room. In this one I created the only possible space. It is a large space so it needs significant power to fill it.
This gives you an idea of the challenge great rooms can create for AV.
So that space takes up the lions share of the main level.
This picture of the system in our family room may give you some ideas.
It is a challenge to accommodate AV without dominating the space. Making it seem a natural part of the space is not easy, but worth the effort.
If it is a dedicated space like and an AV room, then it is much easier, as you are entirely dealing with form and function.
I'm sorry I have been slow to reply, but at Christmas time there are other priorities.
Lastly remember this is your home and you have a right to have it the way you want. The builder will do what he wants unless you keep tight control of him. You need to be assertive and remind the builder it is your home and you have the purse strings. I should make special mention of lighting. This is an area I can guarantee the builder will short change you given half a chance. Their modus operandi is to put in wholly inadequate lighting and a bunch of switched outlets for you to sprinkle casual lamps all over the place. Don't let them get away with that. Good well planned lighting is crucial to a comfortable home.
A good plan of your great room would be very helpful to give you specific and useful advice.