I've been called to the carpet now on a DOS clause and its not as scary as people make it out to be.  

Many people / and or agents really cant do simple math.

People staying for 30-90 days are a completely different customers than someone in a years lease. 

The only caution I give people is to make sure they have a solid income to where they won't feel the pain of the loan. 

I always remember that rockstars know rockstars, so find someone who is a mover and shaker - likely a meetup host - and then ask them who they know.The people doing 100 flips are super busy, so I've also found the best person to find is someone who is a step or two ahead of me...so maybe for you, that is someone doing 2-3 flips a year. 

I strongly recommend against people buying real estate with zero money.

You have to disclose you are an agent and people statistically don't like or trust agents.  

most people don't know and this might get me in trouble. 

People move away, property taxes increase but rents sag because of diminishing demand. 2.

Many people in consideration of #2, take steps to protect the assets so that Medicaid cannot take those assets like a home.