Is the Mini 4K worth it

I am an intern at an architecture firm, and they often need drone photography for in progress and finished projects. I’ve been thinking about getting a drone to do that for them in house (which they’ve already approved) as well as doing it on my own as a sort of side hustle if I really get good at it.

I really like the sound of the mini 4 pro, but it’s a lot to invest upfront and I’d rather get it later on once I’ve made some money from the endeavor. My question is whether the mini 4K is good enough to at least start with, and if the footage Is high enough quality to actually sell commercially.