Most importantly, insurance coverage > LLC for liability protectionThat said, to answer your questions...1.

It doesn’t hurt that the Charlotte MSA is now Statesville to Rock Hill, Hickory to Salisbury with coverage at all points in between.

With the turmoil in the Market in FL, you may want to ask about the things that would cause issues getting coverage or causing higher rates.  

But more properties will be needed than buying in cash.Appreciation/equity paydown: Cash flow from rents will be supplemented by property value gains and tenants paying down your mortgage.As a rough estimate, assuming you can buy properties for $150k that rent for $1,500/month with 50% expense ratios, each property may cash flow around $750/month or $9k/year.

I work in Construction Project Management and have found that way more people than I think have found an avenue into RE that has been supplemental income and even a hobby for them depending upon which route they took.

DSCR stands for Debt service coverage ratio.

In this example, I didn’t include any CapEx costs and the loan is 75% of the value.LTCWith a LTC structure, the lender is willing to lend funds as a percentage of the underlying asset’s purchase price plus renovation/repair costs (project cost).LTC financing is generally viewed as favorable for the borrower albeit, riskier, due to higher leverage, less debt service coverage, and renovation risk in the form of underbudgeting.LTC = Loan Amount / Project CostsMost often, lenders are willing to offer LTC terms structured as a bridge loans.

Any advice you can give me regarding what kind of liability insurance coverage I must ask her to get?

Both VRBO and Airbnb have extra coverage.

However, if you want 3-5 fully paid off houses in 20-30 years to supplement your retirement, then putting a little more down makes sense so you're not having to fund the property out of your personal cash flow.