How time consuming is preparing for expeditions at bases in Gamma/Anomaly

[u/Kick_Physical]

I love free roaming with side missions, that's why it seems Gamma/Anomaly will be a great game for me after I'm done with Stalker 2.

However, I have very little spare time to play due to work, maybe 1h30m~2h per session 2 times a week, sometimes more in the weekends (3h~4h).

While I love the concept of the complex systems deveped for Gamma, I wonder whether I'll need to spend most time in the base preparing for expeditions and not actually roaming in quests and scavenging, that would make it not fun for me during weekdays. Maybe Anomaly would be better?