Flip houses to build capital or just pull equity from rentals?

[Austin Works]

I am looking into building capital for larger investments. To this point, I have only been flipping for capital, I usually leave all of my equity in my rental properties. However, I know other investors who pull equity from rentals as a way to raise money. I am not a fan of this model, since it reduces cash flow, but is this a viable option for raising money? Or is this more like building a house of cards that will eventually catch up to you since you've stripped your cash flow by pulling equity?