These drive-by appraisals are all dependent on the pricing of the neighborhood.Since you live there, you might be able to get the home equity loan upto 90% LTV, but even if the appraisal comes in a $450k, it would only allow you to pull out $42k or so. 

Used some of the HELOC funds to buy a SF that needed some work in which I moved into for a live & flip.

Let's say I contact multiple investor friends, and I inform them that I have the funds to potentially fund their projects.

Hey, I was toying with the idea of using a HELOC to fund a non-real estate investment, specifically buying some debt.

Ideally I know we use hard money lenders for funding and purchasing rehabs.

If so, what down payment amount was their rate quote based on or what LTV was it based on?

Where/how/ who can I get funding from?

In the past year, we started a renovation to add the second bathroom but ran out of funds (this is an attic conversion and our contractor was way low in his estimate).

What’s your current LTV?

@Gary Dawson, there is a way to do that with exchange funds but it is an additional process called a reverse or reverse improvement exchange.