Hi Doug,
For technical support, it’s generally best to login and post on the correct forum as we don’t normally offer technical support here in the pre-sales forum 🙂
I’ve been scheduling them all for Tuesdays at 10 am. It occurred to me that might be too much at one time for either my website or the plugin.
You could spread them out some more for peace of mind, if you liked. That said, we do have checks in place to avoid a “mass hit”: even if you schedule all imports for precisely the same time, in practice they will be handled in reasonably-sized batches.