Quote from @Tiana Lazard:

My tenants will cover the mortgage plus $300. Is that good?

Your definition of "cash flow" does not match what experienced investors teach or look for. 

Cash flow is defined as the money left over after paying for all expenses, including setting aside a certain amount to cover projected expenses like maintenance, vacancies, or capital expenditures.

EXAMPLE:

• Property Price: $250,000
• Down Payment (25%): $62,500
• Loan Amount: $187,500
• Interest Rate: 6.5%
• Loan Term: 30 years
• Monthly Mortgage Payment: $1,185

Monthly Expenses

• Mortgage Payment: $1,185
  Property Taxes: $250
  Insurance: $100
• Maintenance (10% of rent): $250
• Vacancy and CapEx (20% of rent): $500

Rental Income

• Monthly Rent: $2,500
• Total Expenses: $2,285

Cash Flow

• Net Cash Flow: $215 per month 💰

However, there are many other factors to consider. Some invest strictly for cash flow. Some invest for appreciation. If your home is newer, requires little maintenance, and doesn't experience a vacancy for at least 12 months, your $300 cash flow can build up a tidy reserve to get you through. And as time goes by, rents will increase and your income will look better and better.

My first investment in 2004 made $35 more than the mortgage. Although I knew nothing about cash flow formulas, ROI, or anything else, I set that $35 aside every month. I owned that property for eight years and never had to put a dime into it out of my pocket. By the time I sold it, I was making $500/month more than the mortgage.