You should buy an Ursa Mini Pro.
It's an extraordinary camera for the price and an affordable entry into higher level cinema style cameras. This is a camera that you can grow into without growing out of and even when your entire team is shooting on REDs and Alexa Minis you'll still appreciate what you can do with the UMP.
Step down pick: The Panasonic GH5s, a high end hybrid camera with excellent video capabilities but some .
Step up pick: The Panasonic EVA-1, a fantastic entry level cinema camera with a lot of bells and whistles like dual native ISO for flexibility in low light scenarios.
Money is no issue pick: Go with an Arri Amira for top of the line color science and an extremely functional form factor and straightforward ProRes workflow.