Good luck! The token/sec will be under your expectations or it will overheat. You really shouldn't play games with your data-storage. You could try it with an old laptop to see how bad it performs. Ruining your NAS for this is a bit over the top to show, that "it worked somehow". But i don't know, maybe your NAS has a powerful processor and is tuned to the max and you have redundancy and don't care to loose a NAS? Or this was just a joke and i fell for it! ;)

Not sure how powerful their NAS is, but on Umbrel Home (which has an N5105 CPU), it's pretty useable with ~3 tokens generated per second.