They are a bad deal for homeowners and a terrible deal for rentals. 

I went ahead and set up my first channel with Airbnb and a booking site that comes with the subscription.

First - You should be investing to make money and a return.

Capacity and Tolerance. 1) Capacity: how many people can you comfortably fit in the property, is there room to add more, or add more value to the tenants to increase rent.2) Tolerance: How many people are you comfortable living with, if there are vacancies are you able to handle that.House hacking is an amazing path to homeownership, and a nice low barrier to entry into self managing your properties.

Send a document once and ensure it includes a deadline for their response and a consequence for failing to respond.

I like the fact that one and a half units pays all bills.

Since it was 3 stories it was economic to run a main truck line from the basement to the third floor and a main return duct from the basement also to the third floor; and several other smaller runs. 

Subsequently I ended up buying property in 8 states, and a couple weeks ago bought 5 properties in 5 days in 3 states.

Ask a commercial realtor to evaluate your property both from a value and a rental potential.How good is your tenant and their contract?

I think this is a calculation a lot of homeowners are making right now--especially if they have a low interest mortgage, equity, and their house will cashflow as a rental.The choice is a personal one of course, but I think your future self will thank you if you pull out some equity from your existing home with a HELOC for the downpayment on the next house and a cushion renting your current home, use a property manager as you have other things to do, and buy the next house and do the same thing again.