Variable Landlord-Paid Expenses in Bigger Pockets Calc

[Michael Greksa]

I am working on my first deal focused on SFR in Charlotte metro area. I have been evaluating multiple deals using the Bigger Pockets rental property calculator, i have been assuming the following:

Vacancy: 5%

Repairs and Maintenance: 5%

Capex: 5%

Property Management Fees: 5%

With these assumptions, all my analysis are cash flow negative. This is in part due to strong Charlotte real estate market. Are these assumptions too conservative, especially if I plan on doing my own property management in the beginning?