I excluded all expenses including taxes, insurance, HOA, 10% vacancy , 10% Maintainance, and 5% capital expenditure.

When using the Rental Calculator, is it good practice to include all the potential capital expenditures even if everything is brand new or recently replaced? 

You mentioned something important which is that you use data from your portfolio, and as a new investor I'm guessing on expenditures, sure there are guides but they vary based on market location.

Example,Income = Rent = 1,000Expenses = HOA = 330Mortage = Assume 20% down payment at 5% = $429Taxes = Assume $100/monthInsurance = Assume $100/monthProperty Management = 8% of rent = $80Repairs Assume 10% = $100/monthCapital Expenditures = 5% = $50/monthCash Flow = Income - ExpensesCash Flow = 1,000-(330+429+100+100+80+100+50)= (189) in this case, you have to come out approximately $200/month to cover the property.   

Has anybody bought and sold burial plots?

Always plan on capital expenditures!!!

You'd have to work the numbers on multiple options, then include property management fees, capital expenditures, maintenance fees...

Is there any way she can create cash-flow in 10 years that can supplement her rent and expenditures by using her $28k she has saved?

One thing you will want to include in your expenses is CapEX, or Capital Expenditures. 

Do you think it’s ok to break even as long as the mortgage is being paid down and you’re setting money aside for capital expenditures?