Any cash left after settling all notes (and paying back family) can be withdrawn (up to 75-80% LTV).6.

I've been using Guaranteed Rate for my last 2 buys, never used them for a cash-out refi but my lender is not confident that I can get 75%-80% LTV for that, but instead 70%.

There is the week-ish delay of getting your funds but you should have reserves for repairs etc. anyway so that shouldn't be a problem. 

It's just me, my wife and my kids.We are considering looking for and moving to a single family home in a nearby area and I was wondering if we could go through the same or similar process where my parents would 1031 exchange their ownership in the current property towards a new property and where we would sell our ownership and apply the funds towards the downpayment, etc on the new property accordingly.

Obviously that was funded 100% lender had nothing to lose . those two deals alone are equal to what most make in a dozen or so deals.

Typically you can go to a max. of 80% LTV on the cash out on this loan.

I have come to believe I should have a substantial portion of my net worth invested in a Schwab Total Stock Market Index Fund (SWTSX) or Vanguard Total Stock Market Index Fund (VTSAX).

I'm currently in the very early stages of trying to roll an old 401k into an SDIRA and use the $22k worth of funds to get me involved in my first deal.

Part of these funds has already been ear marked for renovating our house to create an Airbnb unit, which will help the financial freedom goal, but that's not the focus of this question...

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.