It's an estimated cash on cash return given current rental rates subtract expenses assuming 7% interest rate, 10% management fee, 5% repairs, 5% capex and other expenses like mortgage, insurance, tax. it's a estimate to tell you what properties to analyze vs ignoreyou can see the are pockets of negative returns as well as pockets of positive return. this is to supplement the data @Devin Conley provided

Unless there is a history of STRs in the property already and you have experience with STR, you really wouldn't be able to supplement your income with that. 

It's not quite as easy as renting out two sides of a duplex, but with the right marketing and management you could rent out the extra unit to supplement the mortgage payment. 

If you just want to make some quick cash so you can supplement your retirement, then sell it and relax.

Is the option government supplied insurance where taxes supplement the insurance?  

This dealflow is then supplemented with deals from the broker channel.The broker channel will get leads in the door quickly, but they are usually of questionable quality and loyalty.

SMS can supplement this strategy but shouldn't be relied on as a long-term strategy. 

Supplement this far simpler entity approach by ensuring you have appropriate types and levels of insurance, you operate your business in a manner in which your conduct is not considered an exclusion in your policy, you work with licensed and insured vendors, you execute contracts with indemnification clauses with these same vendors/ require additional insured status &  maintain appropriate licensing and permits.

Ask the builder or their legal representative for a copy of the CC&Rs (Covenants, Conditions, and Restrictions) or any supplemental documents specific to the development.Financing Considerations: If you’re financing the property, some loan types have limitations on renting out a home within the first year.

End goal is a bit different though since I am looking to supplement retirement income with cashflow which is 20-25 years out.