I just took all my real estate classes and am studying for the test now and was wondering the same thing as you. 

Can they prove how long it takes to rent a vacant property?

You will have to prove your claim.

I don’t want my home involved in a crime, can’t prove anything, but there is so much suspicious activity happening!

I have been diligently reading, studying, and beginning to practice analyzing cash flows of properties within Chicago and some Chi suburban areas.While I try to use whatever tools I have at my disposal and also be conservative with my numbers while analyzing properties (vacancy percentage, expenses, etc) I believe that in some areas of my analyses, I may not be getting the most accurate information.For everyone out there, where do you get your rental estimates by location?

Training is nice, but very often the real world proves that it only goes so far.I have hired dozens of interns in my previous W2 engineering job and each and every one of them was surprised at how much they didn't know.

Having documentation to support your claiming this as a business deduction is critical-to prove the rent was reasonable, you could print rental quotes for similar meeting locations.

Be sure to study up to see what is best for you.

I specialize in STR near Disney and can provide you with some valuable insights that will prove helpful.

As a result, meeting the requirements to be considered  a real estate professional may proved to be difficult.