I know these are a lot of questions but the major theme is seeing if the fundamentals are sound.

I also have this same question, but I'm looking for something not cloud or web based, an actual installable program my logic is that I'll be able to create an Air gap between vital information social security numbers/EIN's  bank information account balances and such to keep it from being "hacked" 

I'll assume you understand what is and is not eligible to invest in an OZ and what the benefits of doing so are, and your question is how to do this yourself for BRRRR properties you buy, rehab, etc...rather than just dropping it in a fund (of which there are many, and that's definitely the easier route, though less 'fun').OzToolKit is the best explanation on the web I've found.

Import my bank account infoImport my credit card infoImport mortgage statementsImport insurance stmtImport personal w2Import my completed taxes I seriously doubt you you will find everything on that list… much less question why you would need to import a w2… but with that said, we use Rentec-Direct… it is a full service software… collects your rent, tracks all expenses, balances cash / checkbooks, screens tenants, has a tenant  facing web portal… and it really cheap compared to other paid services.  

One of the things to note is that we have strong fundamentals in demand and supply.

My opinion on this goes back to the fundamental practice of real estate is to make and maintain good relationships with the people you work with in this space. 

The American culture is taught lowest rate = Best Loan from birth, but it is fundamentally incorrect and grossly one sided. 

Although they saw insane levels of appreciation and record the number of homes being built, the underlying market fundamentals are not there.

There also stands fundamental risks to both, such as knowing your market, knowing your inputs required for finished product, know the margins, know costs etc etc, and even then there is always inherent risk. 

They do have a phone/tablet app as well as a web interface.