How much storage you ideally need? About 10tb usable storage
Do you have some kind of budget ceiling for this system? about 1200$ - 1500$
Do you concern about the overall power consumption of the system? nope, but low power and quite will be a huge plus
Are you gonna use this system in the long term? (like deploying it permanently, etc.). It's going to be my playground, but it will be nice if it will be possible to keep it for the long term usage
Are you gonna use this system for other stuff than just a basic NAS? (like running docker/Plex/Nextcloud, etc). It's going to be only Steam cache system and Plex\other streaming service server
What the main purpose to build this system? does it's need to handle many client at the same time?. Not many, up to 2-3 at the same time on a local network. it's going to be a fun playground to learn and try new things and at the end it will be used as a plain plex server and Steam cache.
Many ppl suggested just to go with just to go with HDD as it will be much cheaper and I don't really need the speeds of the SSD (and that is true)
All in all, after this project I wanna know how to set up a basic NAS for streaming, data and cache.
If possible it will be really thin and really quite.