How can i automate printing of smaller batches within a folder

Hi

I am trying to print in excess of 10,000 files however i can only send in batches of 100 otherwise the printer crashes. I have setup a hot folder to copy the pdf files into from their current folder.

Now i just need some help to create a script or automator function to select a batch of 100 files at a time from the larger folder containing in excess of 10,000 files.

I then need these 100 files to be dropped into the hot folder. I then need the script/automator to select the next 100 pdfs in the folder and drop them in the hot folder.

However the tricky bit is i need there to be a time delay of at least 30 mins between dropping each batch into the hot folder to avoid the printer crashing.

big ask i know but any help would be really appreciated. thanks