Example above isn't so much milling soft metals as it is grinding soft metals. You don't make chips, you make powder. It's hard on the endmills, they have to be replaced often. Also, heat won't be escaping by the chips as should be and thus, both the endmill and the piece will heat up plenty, leading to problems.
If I were you, I'd put a classified looking for someone owning a nice mill in a similar semi-pro setting. And ask them a price for machine time. You provide a nearly-done file and the material stock. They mill with a little profit. Maybe a "FabLab" would do. It's not very developed here so I wouldn't know.
Or you know, China. Nowadays, I send a step file, pay ~300 USD, wait a week and receive 4 samples by express courier. It's somewhat stupid of me I agree but I don't have much time anymore and it's much more convenient than sourcing the material myself, sourcing the endmills, any specialized tooling, preparing the machine, making a mistake or another and so-on. The mill now only serves big/heavy/expensive projects like making other machines.