Anything that someone does not need to physically be here for, save yourself the expenditure and outsource it.

The problem with these 4 unit investments, unless you're seeing a much healthier cash flow, is that it takes one capital expenditure to knock out your positive cash flow and destroy your returns.Can you buy something larger that gives you a better benefit of scale?

The monthly insurance is $45, the monthly taxes are $110, the monthly property management is $50 and, on average, the monthly maintenance is $50.An experienced landlord would also include a few other costs/expenses in the equation:- Vacancy- Capital Expenditures- Overhead (Legal, Accounting, etc)Plus, your PM costs of $50 seems a bit low...does that include the cost of renewing a tenant or finding a new tenant when the old one moves out?

It says that over time, your expenditures will average out to 50% of the gross monthly rent.The 2% rule is a quick, conservative method to see if a property will cashflow.

Given all that there is a very good chance you will be negative for the year and we haven't even touched putting away money for capital expenditures.

Do you want to own C or D properties, which are less expensive up front but may require more upkeep expenditures?

@Michael Randle CapEx (Capital Expenditures) are those costs which, when incurred, will be amortized over a fixed period of years (Roof, new electrical, plumbing, windows), where as repairs, as @David Faulkner pointed out, are minor and are expended in the year they occurred (leaky faucet, new garbage disposal, clogged sink/toilet, one broken window, etc).

After mortgage, insurance, cap. expenditures, main., etc., it would conservatively cash flow $1,000/mo.  

Capital Expenditures:  Again it is dependent on age, condition, and class of the property.  

Look at your other expenditures and debts to see if you can pare those down while you still have the full time income.