I am very familiar with the purchasing process of satellites by LATAM countries. Basically the Chinese or the French (i.e. Airbus) come in and offer you a satellite that ranges between 180M-380M USD in price depending on what you want. The price includes a building with a ground station, the launch, and some basic training. If you negotiate correctly, the full telemetry is send only to you and you process it all locally. If you don’t, then they have a hook on you and hand hold you through the entire process - at an additional cost.

Additionally, after a country purchases one, they tend to have their own development path for the future ones.

For example, the Argentinians did their first four satellites with the help of the US (SAC-A, SAC-B, SAC-C, SAC-D), the next two were done by themselves (ARSAT-1, ARSAT-2), two more with the Italians (SAOCOM-A, SAOCOM-B) and one with the Brazilians (SABIA-MAR).

It is a process filled with a lot of politics, questionable monetary interests, and pseudo national pride.

It is the new shortcut process by which countries are entering the space era. Buy a satellite when you don't know what you are doing, then co-build it with somebody, then build it by yourself. It effectively saves you billions in trial and error tests that other countries had to go through... but it really begs the question of when is it truly yours, because if you don’t follow the rules (e.g. taking high res imagery of an area you are not supposed to), “your” satellite can easily be temporarily or permanently disabled... and there goes your 300M