so to be clear, everything is working for the 10yr?
nssm is good, but i use task scheduler, mounting as system user.
about --dir-cache-time 72h, gdrive has limits in terms of api calls and setting that value to 1m, might cause spikes of api calls.
you might want to read this, it is long but a lot of good info in there.
also, you might want to check out this command rclone serve dlna remote:
this would turn rclone into a dlna server, and any video player, streaming stick would see it as a 'instant' plex server.
i actually run rclone on my cellphone using rclone serve.