You would switch to the one that you need at the time.

To avoid configuration switching, two WiFi to Ethernet adapters, one set to dock WiFi and the other set to your hotspot. Then plug that into some router configured as a WAP if plugging these adapters into the WAN port doesn't work out.

I decline to write a step by step because the person who sets this up must be able to maintain it. If setup is required all network techs I know of can do this.