We think it’s important as it allows us to check for Non-Sufficient Funds (NSF) issues and to determine if an applicant is living paycheck-to-paycheck.

We had built the unit ourselves and had done some sound mitigation as well during construction but it ultimately was not sufficient. 

do you think 1 Gbps is needed or is 500 Mbps sufficient?

If your properties are grouped in different LLCs then one checking and savings for each LLC should be sufficient.

I have consulted with a few attorneys over the past couple years regarding this and have determined that for my own personal situation, umbrella insurance provides sufficient risk mitigation for my situation at this time.

Yeah, insurance is likely more than sufficient for most investors.

Quote from @Eric Prescott: Yes, I understand that appreciation often means less cash flow and good cash flow typically means weaker appreciation, but there is a sweet spot where there is decent appreciation and sufficient cash flow to cover expenses so that the property pays for itself, and that is what I'm honing in on. 

In cities with significant and sustained population growth, rents and prices will rise faster than inflation, enabling financial freedom.Conversely, rents and prices rise slowly in cities with static or declining populations because the current housing inventory is sufficient.

Until then, the general Knowledge a tax accountant has on real estate will be sufficient for the price and benefit I get. 

or is email sufficient?