I have 5 properties (4 SFHs solely owned and one 11 unit, which is co-owned)   I don't plan to buy anymore properties and take on more mortgages for now until I problem solve my current situation.

Cancel your cable and online subscriptions and get rid of your TV2.

It's not "the rent minus the mortgage."

Recently I heard an online property insurance company advertising on one of the BP podcasts, but I can't remember what the name of the company is.

Since we are hard money lenders most of our loan requests come from commercial mortgage brokers.  

Are there other ways to invest idle LLC cash in online savings or money market funds? 

One of your biggest challenges will be separating all the online fluff from reality.EXAMPLE: several S8 "gurus" have already been exposed as frauds, but unfortunately, they sucked in thousands of investors.You're an engineer, use your education & experience to start building up a logical approach to investing in rentals:)Start with this:Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.So, when investing in areas they don’t really know, investors should research the different property Class submarkets.

All of this happened at closing, so I currently have two mortgages on this property and am still cash flowing.

The sooner you buy, the sooner you start having someone else pay your mortgage.

Looking for a good online program for tenants to pay rent.