Equipment suggestion

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For sticks, anything from Sachtler is great. Personally I like the feel, adjustability, and versatility of the larger fluid heads and would go with at least a DV 8, but if it’s just for the HVX-200, you could get away with a lot less. Maybe a DV 2.

For lights I’d go with an Arri kit. Something with a softbox or chimera, maybe this one:
https://www.bhphotovideo.com/bnh/controller/home?O=7822&A=details&Q=&sku=225029&is=REG&addedTroughType=categoryNavigation

If you’re doing seated interviews a wired lavaliere microphone is a good bet for sound.

Personally, unless you are going to be doing this more than a few times a year, I’d talk to your local rental house. It’s better to rent the best rather than buy mediocre, and it’s even better to walk away with cash in your hand instead of gear in your closet, but then again it all depends on how much you will actually use it in the future.

Just my thoughts.