We’ll certainly try 
Purchases is the way to go with these. You may also wish to take advantage of the bulk entry tool to speed up the entry though. More info on that here
Generally, if you’re claiming the VAT back, you should have some record of it. That’s not to say it has to be one QuickFile, but it would certainly make it easier. The question you need to ask yourself is, if HMRC ever queried x, could I prove it? As long as the answer is always yes, you should be fine. Of course, ensure that you’re also meeting any guidelines they have in place too.
Is there anything we can help with in terms of the receipt hub? What are you unsure about it? Fire away with questions - we’re here to help!