Can you get multi-camera live streaming without spending tons of cash on hardware? If you buy the right camera you can add the magic of NDI (https://www.ndi.tv/) to the free software OBS (https://obsproject.com/) and get professional level multi-camera switching with ZERO additional hardware. It also simplifies your cabling to just one wire!
NDI is a very helpful technology that allows you to get low latency video over a standard network connection. See the video below for how it can simply your setup or get you started with multi-cam streaming!
NDI Camera: https://honeyoptics.com/?ref=6
POE Switch: https://amzn.to/36xpj8J
POE Adapter: https://amzn.to/3whhPBk
PTZ Control Plugin: https://github.com/glikely/obs-ptz/releases/tag/v0.10.4
OBS Requirements: https://obsproject.com/wiki/System-Requirements