How to install a pack of software on a large number of PCs?

Question

Windows

There are 250 computers with Windows 10, not included in the domain, but located on the same network (I don’t know why, but here is such an infrastructure). It is necessary to roll out a software package in a week (office, antivirus, all sorts of things like a browser and codecs are no longer needed) for each of them.
I had the idea to "bring with me" a domain on a conditional laptop (server, PC, whatever), put all the computers in this domain, roll out the software using GPO and then throw them out of the domain with a script (I don't know why, but they require a PC outside the domain). I'm afraid to overwhelm the local network with such events, but nothing more sensible came to my mind.
Is this a good plan or are there any other solutions? Computers will arrive in boxes, that is, there will be a first launch with initialization.
UPD:
Clarifications have arrived:
It is forbidden to spill the image, the domain is not recommended.
We also accurately determined the list of software, these are Kaspersky, office, CorelDRAW Suite and some kind of software for managing the class (she knows how to use msi, judging by the instructions for it).

Answer 1

You can prepare an installation image with installed software and distribute it to computers via pxe or wds.

Answer 2

If you just install software on existing systems - it's difficult, you need to write an installer, there will be a lot of fuss.
If it is possible to rearrange the OS, then everything is easier, we take the image of the desired OS, integrate the software there, and put the axis with all the software at once en masse on the computers.
You can start either running with a flash drive / flash drives, or not running, just raise tftp on the network and allow booting over the network in the BIOS.

Answer 3

I would look towards PDQ Deploy. The free version is more than enough.