So due to Chia NAs chassis are damn expensive.
I found this 19" chassi with 24 bay SAS3
www.alibaba.com
what do you think about that chassi and backplane?
I only really need 12-15 bays
There is also this tower option
www.alibaba.com
I found this 19" chassi with 24 bay SAS3

Zhenloong 4u 24 Bay Rackmount Server Case Hard Disk Hot-swap Storage Chassis Sas Sata With 12gb Backplane Sff8643 Data Interface - Buy 4u 24 Bay 4u 24 Bay Rackmount Case Chassis mini Sas Sata 12g Backplane Hot Swap Hard Disk Drive Case Chassis Product on Alibaba.com
Zhenloong 4u 24 Bay Rackmount Server Case Hard Disk Hot-swap Storage Chassis Sas Sata With 12gb Backplane Sff8643 Data Interface - Buy 4u 24 Bay 4u 24 Bay Rackmount Case Chassis mini Sas Sata 12g Backplane Hot Swap Hard Disk Drive Case Chassis Product on Alibaba.com
what do you think about that chassi and backplane?
I only really need 12-15 bays
There is also this tower option

Zhenloong Full Tower Nas Case In Computer Case Itx Matx Atx Eatx 15 Bay Hot Swap 4 Gpu Case Server Graphic Workstation Chassis - Buy Gpu Tower Case Chassis Nas Full Tower Pc Case full Tower Nas 15 Bay Eatx Atx Case Chassis nas Full Tower 15 Bay Gpu Itx Matx Atx Eatx Server Graphic Workstation Case Chassis Product on Alibaba.com
Zhenloong Full Tower Nas Case In Computer Case Itx Matx Atx Eatx 15 Bay Hot Swap 4 Gpu Case Server Graphic Workstation Chassis - Buy Gpu Tower Case Chassis Nas Full Tower Pc Case full Tower Nas 15 Bay Eatx Atx Case Chassis nas Full Tower 15 Bay Gpu Itx Matx Atx Eatx Server Graphic Workstation...