If you want a synth you can buy that has a similar playing style, you could check out the Modern Sounds Pluto: https://www.modernsounds.co/pluto (the original run is sold out but you can find them on ebay/reverb)
It's two of these 4-note step sequencers with some fun timing randomness. Similar to the OP's synth it uses knobs to set pitches but the knobs are picking notes from a specific key so they always sound good together. It's a lot of fun to play and doesn't require any musical knowledge!
There are quite a few cine cameras that are more than 10x this amount, and there are a few that are 100x. For example, there are Panavision cameras that you can only rent direct from Panavision that require that you have half a million dollars of insurance coverage to rent. There are ARRIs that you can buy from B&H that are $100k. $30k is definitely in the range of something that individual DPs/operators could own, although it’s getting into rental territory for lots of people.
It's two of these 4-note step sequencers with some fun timing randomness. Similar to the OP's synth it uses knobs to set pitches but the knobs are picking notes from a specific key so they always sound good together. It's a lot of fun to play and doesn't require any musical knowledge!