You need to provide more info about what you are trying to do.

for instance I just did something similar — I work with a network of clinics who use Netsuite. It’s tax time so the clinics are receiving patient requests for copies (pdfs) of all their transactions.

I wrote a Suitelet that allows clinic staff to show and filter a list of patient transactions and download or email those transactions’ pdfs

So that’s a use case.

Yours so far is to get all transactions.  If all, unfiltered transaction pdfs is really what you need then you also need to be aware that transactions can change.
How will you handle that? Would you want to download or export transactions after the period closes? Does this need to be on demand? Can you export them as they are changed? What about custom templates that pull customer or other record data? Do you need to account for those changes?