This kind of data needs to becaptured using SSLencryptedsend using SSLstored on the webhost STILL in encrypted formatYour access to it could be email, BUT ONLY if sent encrypted and your computer can decrypt it.I've don't web programming for decades and a great many of these free hosting sites don't protect the applicant NOR YOUR liability for the data.

I understand most PM solutions want nothing to do with sensitive data like financial docs, but perhaps an option that encrypts the data on upload, then auto-deletes off the host system (similar to the way many handle credit reports) would be sufficient. 

This is the biggest difference between eRentPayment and Rentalutions.Beyond how our payments are structured, there are other security measures that we take to ensure security:- all personally identifiable information and payment account information is automatically encrypted before it hits our servers using 256-bit encryption- our servers are automatically monitored 24/7/365 to detect for vulnerabilities and automatically block suspicious trafficOur security setup has been rigorously tested by several of our major partners including TransUnion and State Farm.

Do you use any kind of hard disk encryption?

., encryption, redaction of unnecessary stored data like SSNs) you are normally ok.

SSL certificate (required, can range from as low as $25 yearly to as high to a few thousand, depending on how secure the encryption level you want)5.

Here is an analogy: The slime balls that encrypt your data and hold it ransom do so because people pay them. 

If you use drop box or something like that, it is a bit more secure...and then there are paid services like securesafe that I saw which encrypt & pw protect your files when you send them.  

Digital documents with PII are encrypted and password protected. 

Step 2) Have them set the SSID (name of the network) and the encrypted password (for that same network) as identical to the locks (or whatever IoT you plan to use).When the contractor (or whomever) comes up to the door, they should be able to turn on their HotSpot and the door lock would automatically associated to that HotSpot and connect because the SSID and the password are an exact match.