Streaming Clean HDMI Camera

[Erm yeah that’s hard to pick one]

I currently have a Nikon D3300 and mixed amount of the lenses. It works perfectly and clean HDMI out. Issue is it shuts down the live view after 30 mins which is no good.

So I need to find something else but must be the following

Clean HDMI out
Microphone input
Decent zoom range
Not too costly

Any ideas.