Purchasing second property with HELOC from my first property

[Jeffrey Schechter]

My wife and I are looking to add a second property to our portfolio, we are looking to use the appreciated value of our first property to purchase the second.  

I am just looking for some help understanding how to calculate cashflow while needing to incorporate the HELOC's variable interest rate. I don't want to get myself in a situation where I am losing money each month. Please reach out if you have purchased a property with a HELOC or have helped investors in this situation.

Thanks