What is their responsibility if the tenant they place doesn't pay?

This pack of gum (that I did not pay for) accidentally slipped into my pocket...This bottle that I did not scan just got mixed with the other bottles that I did scan...This receipt is not really for this pair of shoes, but I want to return it anyway...Sorry that I dropped $10 ear buds into this Amazon return for $200 ear buds, it got mixed up...Should I continue? 

I pay attention to see if they have been renovated and if they have the same amount of bed/bathrooms, also if it has a pool or not.

The fitness centers I have seen with large windows are usually on the ground floor.

Listen to your elders and network and attend meet and greets, but don’t pay for special attention. 

When I messaged the guest they would have to pay or leave they refused to leave.

I did withdraw from my 401k for this first property downpayment as I do not pay penalties on withdrawals and will definitely kick me into the next tax bracket for this year for overall income. 

As in, she’s leaving because she can’t pay.

You go somewhere like Stamford, Norwalk, Fairfield county, etc. you will pay more/less cash flow but higher rents with higher income professionals being so close to NYC. 

Issue is he is paying 750$ a month for the 3br/1ba unit.