How can I send or share a folder privately to another user?

I want to send my landlord a copy of my ID, a bank account statement, and some paystubs. This is sensitive information, so I would rather not email it, but after exploring the various options that dropbox offers, I think this is my only option.

- "Dropbox Transfer" doesn't work because my landlord doesn't have dropbox.

- "Dropbox DocSend" doesn't work for a number of reasons.

    - I want to send a folder with 3 files.

    - I don't want to pay a ton of extra money for this to work. I already pay for Dropbox Plus.

My Question is: What kind of Dropbox plan/subscription would I need to make this work? I have Dropbox Plus, do I need to upgrade that? Is a "Dropbox DocSend" subscription something different?

Overall I am disappointed at the moment in two things. 

1) This seems like a really basic, simple thing to do, and moreover, it is something that will help prevent crime and identity theft. Why doesn't Dropbox support it? (or at least why do they reserve this feature only for larger business accounts)

2) The pricing structure / feature structure is obscured and is confusing.

I think the end solution will be that I just email my landlord these documents. Hopefully they stay safe.