10 tps, maybe, given the Spark's hobbled memory bandwidth. That's too slow, though. That thread is all about training, which is more compute-intensive.
A couple of DGX Stations are more likely to work well for what I have in mind. But at this point, I'd be pleasantly surprised if those ever ship. If they do, they will be more like $200K each than $100K.
https://forums.developer.nvidia.com/t/6x-spark-setup/354399/...
Or a single user at about 10tps.
This is probably around $30k if you go with the 1tb models.