It depends on the area you're working in too.

As Pari said, you can learn notes and earn more than that, or if you want mailbox money and do no work, JV with a note investor and you can get 12%+ and your money is not tied up for years but on average 12-18 months (or less) depending on the deal. 

I would think it depends on the company, and their tolerance and experience with it.

I suppose that it depends on how the math works out...

This is neighborhood dependent though and also capital expenditure free.

I think it all depends on what you are looking to do with the social media / how you want it to help you.

Might have to look into this...I'm still over here getting a new card for the $200 off of $500 in the first 3 months and borrowing free money for a year lol I've always done cash-back and just make sure I use the card w/ the highest percentage for whatever I'm buying - I think Amazon is 6-7% back (depending how how fast you want it delivered), Wal-mart had a good one (5% back) there but I believe their partnership w/ CapitalOne just ended, Costco has a good one (4% back and I think 7% on gas). 

It really depends on location, quality of home features, amount of privacy for renters/members, and competition.

It totally depends upon the size of the STR. 

Some property managers will also give discounts depending on the number of doors.