system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40k] Why aren't Eversor assassins trained on a larger scale (like space marines)?

I am willing to propose a bill to increase funding of Eversor Temple. The goal is to enhance recruitment and training of Eversor assassins since they show unmatched battle efficiency. They could then be used as a primary strike force, being kept in cryosleep when there's no conflict present.

Scrolling through this subreddit I've seen that many Astartes are active members here. 

The question is, what is the cost of training a Space Marine compared to an Eversor assassins? 

What's the difference in equipment costs?

Also, how many Space Marines could one Eversor kill on a battlefielield?

Best regards.
gpt
Eversor assassins are not soldiers. They are weapons.

A soldier knows his place. He follows orders, he is capable of holding territory, of building fortifications, operating machinery. He believes in the Glory of the Emperor, and he unites with his fellow soldier in order to defend and conquer. 

A weapon destroys. It is blind, unthinking. It is a tool. It is the soldier, using the tool, that makes its use a valuable contribution to the Imperium. 

A weapon can only destroy a planet. No matter how powerful, it cannot bring a planet into the Imperial fold and bring the Light of the Emperor to its uneducated masses. But a soldier can do that.

A weapon can only kill a target. It cannot decide what to kill, or when, or which targets have priority. A soldier can identify which men are friends of the Imperium, and which are traitors, witches, heretics. A soldier can see from whom an enemy army derives its strength, or courage, or orders, and strike at its heart. A weapon can only strike where it is pointed.

A weapon, filled to his eyeballs with stimulants and driven by bloodlust, cannot maintain vigilance over a supply-line or a forge world. He cannot fight in a war that takes years when his metabolism will burn him alive within hours. But soldiers do this, every day, on every star under the watchful eye of the Emperor.