Ruins the integrity of the board a lot. 

One mistake or big unexpected expense could ruin you if you only have one or two rentals that are not cash flowing.That said, especially in the current environment, if you are coming from a very strong financial position then there may be times where it may fit your goals to invest in a highly appreciating area with no or negative cash flow.

I suspect it isn't just that they are responsible people, they probably don't want the good credit score to be ruined by non-payment/late rent.

about managing rentals before you start bleeding cash and ruining your life.

That alone could ruin the outlook for you, so just make real sure of the physical condition of the property.

Most of our water pipes are in the ceiling here and when one breaks it ruins the floor, plus we have had some flooding and other issues in FL.

He was just an unemployed alcoholic living off the government teat, ruining one rental after another.Smells like money.

Sometimes these types of deals require that you purchase a software to help search for lots,so we'll see.Most of the time,established people in industry are not going to come online and scam people,why would they ruin their own business in the offline arena?

Because I'm here, active in the market and I do NOT want every fool rushing in and ruining it for me and my clients.    

We're not curing cancer; it's just buying real estate, doing some basic math, buying some furniture and kitchen utensils, maybe getting creative with some amenities, and listing properties on STR platforms...it's daunting when you're new, certainly a grind to get started, but it's not a mystery or puzzle to solve.