I think it is great you obtained those lots at that excellent price and want to increase the value. 

Data point: we have a long-term rental in a popular STR neighborhood listed through Zillow right now.Every person who writes asking to do some sort of arbitrage is blocked by the Zillow platform.I don't even have to say "no thank you anymore."  

How do you see this coverage increasing as he scales?

Quote from @Andrew Steffens: I have no idea who that is hahaI have seen an increase in this (like everyone else) because Airbnb spoils guests. 

My motivation is to increase my financial literacy and diversify into real estate.I have rented all my life and seek to become a homeowner/ investor to help my family and make their lives easier.

(make sure you are budgeting for maintenance and management if you plan to use it) Rent will increase over time and your property will continue to appreciate in value. 

You can simply request a separate check for the $100 increase to bring the total deposit in line with the new rent amount.

A hot tub is shown to increase STR revenues by 30% or so.

@Marcos De la CruzHave you ever appealed the property tax increases on your Dallas rental?

The property was in a great market but needed a full cosmetic rehab and basement finish to add a bedroom and increase resale value.