10k active torrents is way too many.
If you want to keep them loaded, then turn them off in the client and turn them back on when you get a reseed request.
My laptop has 32gb of RAM, 2.5gb of internal SSD (though I don't store videos on C drive) and 10tb over 2 external HDDs can barely handle 500 active torrents.
NOTE: By "active torrents" I mean turned on in your client, whether seeding/leeching or not.

