@Steve S.
For calculating CCR using the BRRRR strategy it is still basically the same. The main difference is you are including more costs into your cash invested. The following should be included;
Acquisition costs (Deposits, cash purchase), Rehab costs, Closing costs (Purchase, Hard Money Loan Points, Refinance Fees), Holding Costs (Mortgage payments, taxes, insurance, HOA fees, utilities, etc that occurs during the Rehab period and up until the property is fully rented).
I did not see you include any closing or holding costs. These can add up significantly. If you did not include them then this may not even be a good Flip.
Back to CCR Calculation. I cannot derive a reasonable Cash Flow analysis using your data since you left out several key numbers. Once an Annual Pre-Tax Cash Flow is determined you can do your CCR calculation. CCR = Annual Pre-Tax Cash Flow / Actual Cash Invested x 100%. Using the 50% Rule for Cash Flow analysis your going to be negative.