Relax and respond legitimate request, ignore other.

I'm at the point of messaging each guest I have booked, and telling them to book through AirBnB or VRBO to make their reservation legitimate. 

What are some of the more legitimate, often used, loan types for subsequent properties?

In order to achieve this goal, you need a passive income that meets three requirements:Inflation compensating: Rental income keeps pace with inflation, enabling you to maintain your standard of living by providing additional dollars needed to pay inflated prices today and in the future.Persistent income: Your income will last so you will not run out of money.Reliable income: Your income continues even in difficult economic times.Maintaining your living standard depends on being able to buy the same goods and services in the future as you do today.

Unless you inherited wealth, debt enables you to generate income and appreciation provided you are willing to take risk and have the know how. 

Just to clarify, if I go this route it would be treated as a legitimate business and not a hobby.

Legitimately.

See the image below for reference.This process has enabled us to achieve first-year positive cash flow.SummaryThere are good deals available in Las Vegas, but they would be almost impossible to find by hand.

This enabled me to quickly eliminate properties that aren’t likely to perform and focus on the few with potential.Over the years, I've accumulated 10+ years of behavioral data down to individual streets and subdivisions for the areas we normally find properties.

However, my license has enabled me to generate additional income to be used as capital for investing.