Does the sponsor have skin in the game?

The teacher did try and have us study balancing a check book and calculate interest rates but the class was meant for kids who couldn't pass normal high school math.

You can normally work smarter not harder simply by investing in better real estate.The last thing I will add is the notion of cash flow and BRRRR being dual objectives.

and you can find an almost unlimited variation on risk ( from low to high leverage, both floating and fixed rate debt, from no to high skin in the game, etc).

You have no skin in the game! 

If I just go by AirDNA, the difference is not much in annual revenues.Thanks,AnkurA pool will get you on average $75-100/night in addition to normal rates (I think this number is dropping due to additional saturation of pool cabins).  

The one who owns the house will normally dictate who will report the activity on their return.

It’s normally the investors sitting behind a computer who fail to recognize this.

If the room is a mess when she leaves or she's not paid part of her rent, then remove that as you normally would from the deposit and return the rest to her. 

You can recover damages from a security deposit, but you cannot recover normal wear and tear.