The easiest way to expand networks is to use what’s called ‘mesh wifi’. The set-up is very simple. You have one base station that you connect to your modem and then you have satellites that you can put all over the warehouse. Click on the following link to learn more. Any of these options require little to no technical knowledge and should work for you: https://www.pcmag.com/roundup/350795/the-best-wi-fi-mesh-network-systems
We can also help you with the set up of the mesh wifi remotely.