If you believe she is honest, hard working and her style of communicating fits you- she needs an app to help her with paperwork I suggest yardi or doorloop/ get a contract in writing that you negotiate with every nitty gritty duty- for example: who keeps copies of keys, how often are inspections done and how is the data provided to you, what dollar amount she can front money for repairs, when to call you...

How can I read this data ?

It is cumbersome though, and confusing when getting beyond common data entries.  

Regarding saving confidential data, you will need to follow:  https://www.ssa.gov/privacy/privacy_act_1974.html

One piece of advice I would recommend if you want to go FHA is getting to understand the self sufficiency test for 3 and 4 unit buildings. https://www.newcastle.loans/mortgage-guide/fha-self-sufficie... 

Can appraisers possibly consider a broker's price opinion on a property based on market data? 

When looking in markets where the prices of homes sold is private and not provided , how are you running your comps?  I am looking at what they were listed for but it seems to be open ended and not very reliable when ...

Gather some market data- look for local market reports and engage a commercial real estate broker who can provide some great market insights.

You want the applicant to fill it out online because the screening company needs access to the data to process it.Here's a detailed guide on how to screen applicants: Application Screening Guide

For B2B, Data Axle is invaluable.