I spend about 15 hours promoting them, collecting rent, doing repairs and all other necessities.  25 x 52 is 1300 hours. 

We're in TX and air conditioning is a necessity with heat needed only a few weeks out of the year.

ALWAYS do a title search, they are a necessity and very enlightening.

But much of that sentiment involves turf wars as much as necessity.

There are legal grounds for easement such as implication, prescription and necessity, which I won't go into here, refer to your law school texts.

However, for those that have lived in the neighborhood as Renters, particularly non-Rent Stabilized apts, for a long time and have not improved their personal economics to the same degree of the neighborhood, this really presents a problem.They basically get completely priced out of the market.Even for those that hold on to their rent protected apartments, and there are a LOT of those kinds of apartments, their rents are much lower than the current Market Value, BUT they find themselves with very few options for lower priced necessities like Food and Pharmaceuticals.For the non-Rent protected Apts, having the option of AirBnB, allows the Renter to be able to stay in their apt, even if they couldn't afford it because generally, you can make as much money for the entire month's rent in probably a week or two.For the savvy Renter, he starts to look at his apartment not as a place to settle down and call home, but as a place where he can improve his economics.

The necessity of having a LLC for protection is not born out by real life experience.

Stock the kitchen with all the necessities... enough cookware, crock pot, food processor, blender, all needed utensils, etc etc... anything you think you may need, provide it and it will go a long way with guests, especially in reviews. 

Things like prescriptive easements, necessity, condemnation, or even being required to put in a new service from a place on your property out into the street. 

I provide window covers for all windows in my rentals, but it's either the $5 mini blinds or cheap black out curtains for larger windows, but I don't think it is am absolute necessity, especially in a room that isn't a bathroom or bedroom.