I don't know what the issue is/was, but I think a lot of customers want to play games and he probably did his best to keep them on the straight and narrow. 

You may want to make an introduction between your CPA to those 2 colleagues.The CPA can go over their services and pricing to your colleagues.I partner with many people on real estate deals - It never gets to a discussion on whether they do their own tax return or hire a professional.If a partner mentions he will provide capital - does he provide the capital on a timely manner.If a partner mentions he will find deals - does he find many deals and provide an analysisIf a partner mentions he will manage a property - does he manage the property well(find tenants, collect rent, communicate with contractors, etc)

It is also providing great experience for them so win win.   

I'm looking for the cleanest & most visible way to access payment history, see amortization schedule, tax documents, etc- much like bank softwares provide. 

(Even went beyond the second page of Google.)I have an investor who wants to partner on a deal by providing a loan for the down payment.

I can’t think of an expensive subscription that doesn’t provide an app.

It's an education that Harvard, Yale or Stanford can not provide and it's FREE! 

The home was then sold for a profit, providing a strong return on investment.

There are some that provide coverage but of course the premiums and higher. 

Even if the rental has a decent cash flow with additional flood insurance, we're still not sure we want to take on that risk as we are out-of-state investors (planning to move back to KY in the future, but not now) and we don't like that it will potentially bring down the perceived value when we try to sell it in the future.The seller has never lived there and has not provided any information on if it has flooded before or not.