If you have already used some of your eligibility, take 25% of your loan limit, subtract the used eligibility from your COE, and then multiply that number by 4. 

Subtract all costs (mortgage, property taxes, insurance, maintenance, property management fees, and HOA fees) from rental income to determine the estimated monthly cash flow.

Then we need to subtract transactional cost of selling (broker commission), so that brinks us down to $64.5 million.  

You should subtract the operating income from your operating expenses (including property taxes) to get your net income.

Then compare against potential rent, subtract vacancies (5-10%), subtract property management (8%), subtract maintenance (8%) then subtract insurance and property taxes.

In general JADU subtract value from the RE and many agents recommend their removal at time of sale.  

Take your gross rental income and subtract it by your PITI and thats your cash flow.

not really after taxes and realtor fees.I think we are talking about the same deadline: If you did not live there for 2 years of the previous 5 years, you cannot take that 500K subtraction from your capital gain, assuming you file jointly.  

I subtract those off the top to compute cashflow. 

I didn't know the 70% (and then subtract out repair costs) rule.