HELOC as a down payment?

[Tina Enheduanna]

Hello, All, 

I am considering getting a HELOC in order to have cash on hand for any investment that comes up. I am hearing that drawing on it reduces your FICO 50-60 points, and then your DTI ratio also goes up. Those 2 problems would make it so I'd never be able to finance or refinance.

How do you use a HELOC as a down payment? Or even to purchase all cash....how would you refinance?

Thank you kindly, 

Tina