It's only considered harmful if it's dusted and becomes airborne.

Develop good money management habits NOW.

QB also backs up periodically if the application is left open for a long period of time, which is a bad habit of mine.

I was a lot younger then and didn't have the best housekeeping habits.  

Assigning contracts as a means to broker without a license, bogus inspections, and harm to the public.

Real Estate lies on value for all parties concerned but value is measured through compensation in this game.Definitely no harm in being your own realtor to gain access to MLS properties but you could still conjure up relationships with realtors where they can get more involved with your project not just as realtors but as project managers or even partners.

Knowing tools will keep you from bad habits, a screwdriver is not a pry bar or chisel.

Don't harm your future by getting put on a "bad host" list.With that said, after the initial 30 day stay booked through AirBnB, you will have a feel for who the tenant is.

A garage that is not properly insulated may be uncomfortable to live in and may not meet local building codes for habitation.

Let me remind everyone that no one gets harmed in this transaction.