@Joe Villeneuve EO also has a way of doing it with rentals.
Ultimately, I want my cash working for me at all times. I Could take the cash flow from my rentals and let that money sit in a bank account earning 0% interest until it's large enough to go toward my next investment or I am comfortable enough to use it to pay down the debt on my property, that's one way to do it. I prefer to have a HELOC on one of my rentals, take all the cash flow either one or more rentals and pay off the HELOC. The HELOC functions the same way as a checking account. If I need to pull money out for a rainy day, I can. Now my money is working saving me 5-6% interest. Ultimately the goal is to pay off the property as quickly as possible. The less interest one can pay is ideal. I would rather pay $125K on a $100K loan versus $200K on a $100K loan. When you pay the mortgage, x-goes to principal and y-goes to interest. I want to pay as little interest as possible which will save me money over the life of the loan. In this scenario, all the funds comes from rental properties. But again, this depends on your investment philosophy and goals.