I use a product called Chromatte which obviates things like lighting and separation and requires only light for the talent. It gets a brilliant key just using the keyer in FCP (but I’ve also used the keyer from the same company that makes the Chromatte for FCP, a demo is available somewhere on Apple’s site). I’m not going to link to myself because that would be self aggrandizing, but the manufacturer is Reflecmedia and a quick Google will turn up a lot on it.
* On rereading your post I see that your budget is $400, which puts this out of your pricerange, but at least it’s topical 🙂
Eric Pratt
https://www.virtualsetworks.com