It also might not be a meaningful distinction, but my business is focused on buy and hold, rather than flipping, so I don't have plans to sell any of these projects in the next several years, although I likely won't personally occupy them.  

Is there a distinct line on when you have to do that (relationship with investor, amount of money, size of deal,etc.)?

@Roy N. that's a very helpful distinction.

The phrase "this is a business" and "training your tenant" come up alot in discussions like this.There is a distinction between what that means said to a tenant and what that means when said to a business partner or peer.You want your tenant to understand that phrase to mean they should pay what is due, when it is due or suffer the consequences stipulated in the contract.

There are 2 distinct boxes Also, see the screenshot below.

I ask 5 distinct questions that must be answered in their response e-mail.  

In SF there is no distinction if it's apartments or condos, just unit count limit that is zoned. 

Forgot to mention that the distinction between meters costing thousands of dollars vs. about a hundred may be whether or not the meters are installed by the utility... where I'm based the public utilities charge an arm and a leg for meter installation, but we are installing our own cold water submeters (upstream of the utility meter) in each unit for somewhere around $200 each I believe (don't have the numbers in front of me), which includes the cost of the wireless transmitters, repeaters, and receiver.

There is definitive distinction between a "support animal" which has not technically been  certified as "service animal".

I'm young in the game, my mentor Christopher does it all; flipping, rentals, private/hardmoney lending (whichever distinction you choose to draw from those two i suppose).