If your laptop can't handle a 50-track session, that's an awfully limited laptop by today's standards. The laptop I recently demoted after 6 (yes six) years of nonstop service as my do-everything machine had no problem with handling such a load. With negligible latency.
I can't argue with that, some of the best I know do the lot on a Macbook by default.
96K though? Hmm...