Or do you retain the license indefinitely and just cannot actually use the privileges until you hang it with someone?

The cost of setting up an LLC for each property and trouble of having to pay a business privilege tax in the amount of $100 for each LLC is aggravating as well. 

Maybe a good tip for sure, but still, you'd be severely limiting yourself if only considering Zillow or any other website for that matter.It sure depends on what your goals are, but in general, building long term privileged face to face relationships with agents of trust working in your market of choice can pay off just as much if not much more, and these can be found in your local area, meetup, or just about anywhere else.

And the tenant would respond in writing,:"Your concern for safety is admirable however; neither the tenant or the landlord enjoy the privilege of the services of a certified fire inspector to safely determine if the alleged "buildup of grease" in fact poses a fire safety concern.

I was living in New York City and would cringe every time I would see most of my paycheck evaporate each month after paying someone else the privilege for living in a shoebox.

Maybe not your responsibility, but it can be your privilege).   

And what, you pay the difference for the privilege of being in the middle?

I only had to revoke this "privilege" once, fortunately it was a verbal agreement with that tenant.

Good idea, I wish I did that while in College.I recommend a lease..I rent 1 of my Condos to College Students 4 br/4ba so each of my tenant has a private bathroom.I suggest in Lease be specific on what you expect with Utilities, number of guests, and bathroom privileges (not sure if you're sharing bathrooms).

The number is then divided by the number of units, with a higher proportion going to those with more bedrooms and or other amenities, like if parking or other privileges are included.