My reasoning - my cash can constantly be at work in the aforementioned portfolio (as opposed to a money market type of account), but I still have access to 60-70% of the cash to continue flipping a couple houses at time.  

Running a profitable business is one of the hardest things out there and letting someone have access to that can severely limit your upside potential.With the likely volatility in the stock market, real estate and notes will be attractive options.

An independent agent with access to Travelers will most likely be able to write you the type of policy you need.

Regardless of the new layout, I know there are people in here with access to the type of deals I'm currently seeking. 

Decide how much money you have access to, & the zip codes, city or state you want to focus on.

Also, you make it harder for yourself to access cash when you might need it, whether for emergencies or more investing.I'd go the other way. 

Is access easy where you do not have to turn around in a median to get there?

Just getting access is hard enough, then when you finally get it, you wish you hadn't. 

In my experience there are ways to access business lines of credit and use them in conjunction with a commercial construction loan or hard money lender.

99 percent of the realtors in every don't know anything about investing and will never have access to off-market deals or know what do with them.