Other's argue that proper liability insurance coverage will be all that you need.2) If you invest out of state in real estate. 

I've built a comprehensive model that includes the costs of capital, holding costs, etc.

Where can I find software/platforms that offer comprehensive info on markets, such as population growth, economy, price to rent, crime, projected apprecation, etc.??

It includes liability coverage, right?

The dealings of my trade were but a drop of water in the comprehensive ocean of my business!”

Pre-COVID-19 era, agencies were lending for 3%-3.7% interest rates, 65% to 75% loan-to-value (LTV) for 25-30 years, and required 1.25x DSCR (debt to coverage ratio, which is the ratio between the Net Operating Income and the loan payment).

It doesn't cost anything extra and provides additional coverage for you.

I highly recommend you require tenants with pets to carry renters insurance with pet liability coverage (injury or damage). 

The insurance just came up for renewal a couple weeks ago and it went from 8k to 11k for 1M liability coverage.

If so, depending on the number of properties your main Insurance carrier (home and/or auto) may be able to offer coverage.