Have you come across other quality STR insurance options?

NONOPayment Calculation Years 1-30 Principal & InterestMortgage InsuranceEstimated EscrowAmount can increase over timeEstimated Total Monthly PaymentEstimated Taxes, Insurance & AssessmentsAmount can increase over time See page 4 for detailsCosts at Closing Closing CostsCash to CloseCLOSING DISCLOSURE$836.31++--$836.31This estimate includes In escrow?

I am currently working as a Licensed Insurance Agent in SoCal.  

@Cherrell Thomas cash flow is the profit that's left after debt service, property taxes, property management, common utilities (if any), reserves for repairs (small things like leaky faucets, AC servicing, etc), and capital expenditures or capEx (larger things like a new roof,new HVAC, major plumbing overhaul...these are treated differently on taxes, written off over a specified longer period) and other expenses.The first item I mentioned, debt service, is where the answer to your question is.

He then proceeds to inform us that the plumbing technician wont be able to get us a new tank and line installed until the 5th of October.

My plan is to hold it as a rental, but the flood insurance premium might be a CF killer. 

They also sell the T bar that makes this easier at plumbing supply places. 

Assuming that you're accounting for ALL expenses including vacancy, maintenance, CapEx, insurance, etc., then that is still a low return from the cash flow side of things. 

The GC was licensed and insured.

Here's what I set aside per unit:Taxes:  ~ $100 per monthTurnover expense:  3.5% GSRWater/Sewer/Trash: $30-$45 per monthMaintenance: 12%Cap Ex: 2.5%Overhead: 1%Insurance: ~$25/mo.Debt service (100% leveraged): $350-$400EVERYTHING ABOVE is increased by 10% to account for vacancyAll told, each unit still cash flows between $100 and $200 per month.These are B-/C+ small MF properties.Note I do not pay for management as I self-manage, but that is offset by the increased debt service created by the 100% leverage.