Obligatory: I have not used one.

Towards the end he says:

1) "It has that sort of midrangey sound"

I read that as "a lav or boom is better". And he'd be right. But...

2) "I don't use stereo for dialogue."

( should you tell him to mute a channel for mono or should I? :)

The H1n seems a solid unit to me and great bang for the buck. I found a wind furball thingy for it for $10 US :

https://www.amazon.com/SUNMON-Windscreen-Portable-Recorder-Windshield/dp/B07KP6QJFN

but I dunno what sort of cheaper alternatives there might be or what you can improvise. I just know that small condenser elements in the wind WILL get wind noise.