real quick, you have PM @3%, 0 for advertising, 0 for water/sewer/ garbage, and only 5% for repair and 5% cap ex.

., sewer, electric, garbage?

Are the units near the elevator or garbage shute - things that another owner (or renter) would find bothersome. 

You would need to add up down payment+closing costs+holding costs during rehab+loan points/fees+Interest payments per length of the rehab+any other monthly expenses (city garbage)=Total cash needed to run the dealI'm trying to figure out what all needs to be included to calculate the total cash i need to bring to the deal in order to get it refinanced and have the tenants start paying the operating expenses. 

) - Gross Monthly Operating Income 1,306.73 Monthly Operating ExpensesProperty Management Fees$142.50Repairs and Maintenance 142.50 Real Estate Taxes 75.00 Rental Property Insurance 94.00 Homeowners/Property Association FeesReplacement Reserve 130.00 Utilities 50.00 - Water and Sewer - Gas and Electricity - Garbage - Cable, Phone, InternetPest Control 50.00 Accounting and LegalAdvertisingMonthly Operating Expenses 684.00 Net Operating Income (NOI)Total Annual Operating Income 15,680.70 Total Annual Operating Expense 8,208.00 Annual Net Operating Income 7,472.70 Capitalization Rate and ValuationDesired Capitalization Rate7.50%Property Valuation (Offer Price) 99,636.00 Actual Purchase Price 90,000.00 Actual Capitalization Rate8.30%Loan InformationDown Payment 25,000.00 Loan Amount 65,000.00 Acquisition Costs and Loan Fees 2,500.00 Length of Mortgage (years) 30 Annual Interest Rate6.000%Initial Investment 27,500.00 Monthly Mortgage Payment (PI) 389.71 Annual Interest 3,878.29 Annual Principal 798.21 Total Annual Debt Service 4,676.49 Cash Flow and ROITotal Monthly Cash Flow (before taxes) 233.02 Total Annual Cash Flow (before taxes) 2,796.21 Cash on Cash Return (ROI)10.17%

I know you can look up past property taxes for a property on the county website but how do you go about finding what the past electric, water, sewer, and garbage expenses will be?

In New Zealand a trashed house has a dozen garbage bags in the backyard, an unflushed toilet and dirty dishes in the sink :-).  

I also hire labor for some demo, garbage removal, painting etc.

Remember, everything that glitters ain't gold and everything that smells isn't garbage.

problem with these areas is that even if your block or neighborhood isnt bad, the one right next door is garbage... and those people are at your prospective tenants schools, stores, doctors offices... stealing non stop etc...