post/code the deposits and expenses (loaded comment) Without even yet talking about expenses, just Deposits for example: Quick book takes time if you invoice and let renters pay you online.

Dang boi!

Oh, lastly nickel and diming investors for fees (new lease fee, lease renewal fee, Section 8 tenant fee, invoice payment fee, etc).  

-Bruce Dang!

@Michael Dang, @Mike Dymski, @Michael Le, @Alina Trigub: Thank you all, sincerely, for taking the time to answer my question and provide value!

They also put all your properties on one simple monthly invoice, send it to you 3 weeks ahead of time in case you need to make changes that month, and you only pay month-to-month, so if you sell a property, you cancel and don't have to pay for time not used, which most companies charge you a min of 3-6 months, if not 12 in advance and will not refund any premiums.

Our plan is to take her security deposit to pay for the replacement of the carpeting and to write her an invoice for the remainder of the bill and take her to small claims court if she doesn’t pay the outstanding balance.

I had the city disconnect their electric and water, then I sent an invoice for the rent to their employer. 

I sent her the invoice for her unit in November and she paid within 2 days. 

Hello @Karthik Ramachandran@Michael Dang said it best with the Joe Fairless and Theo Hicks option.