@ingeborgdot 

Do you want to move all Omada devices you mentioned from your friend's office to a new site? What do you mean not affect the existing router?

If you configured those devices on Omada controller, just relocating them won't lose the settings you made.

@ingeborgdot I prepared everything (networks, port config, etc) but did not enable the EAP radios to prevent interference. Then at one moment I planned downtime and switched all the hardware which took me about 15 min. Then I enabled the radios on the EAPs. The longest time I had to wait for my ISP to release the MAC address of my old router. I was up and running in about 30 mins. This can be done if all the cabling is in place, of course.

@ingeborgdot 

I think you can refer to this video. This guy configured his whole system before connecting to the ISP line.

https://www.youtube.com/watch?v=7i17jvrIjD0

@Somnus I have watched that one.  It was very informative.  So, I won't need to have an internet connection to get all of this done?  That was my biggest concern. 

When I do the switch over, I also have to reroute cables, add cables, etc.  I think it may work out to start on a Saturday afternoon and have them leave early, which he will, and work late, and then hopefully finish up on Sunday.  If it were only setting up the router etc. that wouldn't take too long, it is having to do all of the other stuff too that will make it take a lot longer.