Lots of smaller drives (SAS 2 TB) what to do.

I managed to snag 60 of them for 30€... why... because 120 tb for 30€. Now as to what to do with them... im absolutely not making a 60 drives nas. The scam electricity prices in Europe make it impossible. Or maybe i should do exactly that but use it sporadically as a backup unit.

Any advice on how to use them? main nas has larger drives and if anything im pivoting towards 12tb+ units