@Lori Greene
I bought a SFR cash for 15k, put $7k In to repairs, cash-out refi for 70k, which put 50k in my pocket which I used for a down payment for a 5 unit I got for 170k that appraised at 240k and cash flows $1,200 a month. I never would have been able to come up with the down payment for the 5 unit without the refi of the SFR, so it is a very powerful strategy.
As far as cash out vs. HELOC, the way I see it a HELOC makes sense if you are doing a flip or if the HELOC allows you to pay cash for the rental property because you'll be able to pay off the HELOC quickly once you refi the rental property or sell the flip and you'll be able to avoid the extra expense of doing a refi. But a Cash out refi makes sense if the amount will only be enough for a down payment on the next property because once you buy the new property it would be difficult to do a Cash out refi on the new property right away in order to get the money you will need to pay off your HELOC, which will be at a higher interest rate than if you had done the cash out in the first place.