Hi Filip,
I think that you can probably achieve all you want and need with the Rock64. However, since you wish to use multiple drives I'd probably suggest using a RockPro64 with a PCIe->SATA adapter. This also leaves plenty of room for all sorts of expansion possible (since you'll still have USB 3 and C available).
There is also a nice case to fit it all if you want to.
I think that you can probably achieve all you want and need with the Rock64. However, since you wish to use multiple drives I'd probably suggest using a RockPro64 with a PCIe->SATA adapter. This also leaves plenty of room for all sorts of expansion possible (since you'll still have USB 3 and C available).
There is also a nice case to fit it all if you want to.