Which is the best calculator to use in this situation?

[Tracey Pierce]

I'm struggling with what calculator is best to use. I am using my HELOC for an all-cash purchase. I will fix the property and then put a renter in. I will leave that property in the HELOC. In order to properly assess payment as the payments will be used to pay back my HELOC (even though it's an all-cash offer) how do I properly assess in the calculator? I know the BRRRR calculator is for reassessing and getting a new loan. The fix and flip is not the right one, the buy and hold seems to be the best, but I'm not 100% sure how to add in the numbers for the payback since I used all cash.