For years I owned one self-managed property that I was easily able to do the bookkeeping on with Excel.

It is crucial to surround oneself with continually learning and growing individuals.

Does an Airbnb also work if its managed by a management company and not oneself?

I tend to think that might be the more prudent way to do it versus assuming that role oneself.

I'm not trying to throw accusations in people's faces here, but one must always look to improve oneself - perhaps you have a problem with tenant screening?

Money....or lack of edcucating oneself, would play two large roles in my opinion.

Mainly lead poisoning.A custodian does not appoint oneself.

Why would I allow someone that lacks the desire or the ability to actually be an investor (arbitrage is not investing, it is creating a job for oneself) to attempt to make $$ on my property, while I take all of the risk? 

(a) Any person who practices, offers to practice, attempts to practice, or holds oneself out to practice as a managing broker, broker, or residential leasing agent without being licensed under this Act shall, in addition to any other penalty provided by law, pay a civil penalty to the Department in an amount not to exceed $25,000 for each offense as determined by the Department.

Constantly comparing oneself to others.