Could save some money and go for the Mini 3 Pro instead still a great drone.
This. Unless you can get the 4 cheap, there really is little difference between the 3 and 4. the 4 gets 60fps 4k vs 30fps and more collision avoidance and a slightly longer flight time but thats the major differences.
There are some decent deals on refurbished mini pro 3 kits atm which makes them £300-£400 cheaper than a pro 4.