If I use a heloc and they did for some mysterious reason call the note due, what is the worst thing that could happen? 

I've done mystery shops and refinished furniture over the years to build up money.

We had a GC come out and look at it, who estimated it, but then as that went underway, we figured out the mystery - the electrical couldn't support both units -- blammo a few K more. 

There are plenty of good books out there that with your help can be very beneficial to your kids.I have started my kids at age 8 with books like "How the economy grows and why it crashes", The Uncle Eric series (Whatever happened to penny candy, the money mysteries, etc.) and now at age 9 we are reading Rich dad poor Dad.

I'd say 90k for purchase, 20k for rehab, 10k for closing costs, commissions, fees, other mystery and unexpected fees and things that come up.

No need to pay anyone, you can do it yourself and there is no need to know mysterious technical techniques.

She is always writing lengthy letters quoting the housing laws and having mysterious health issues. 

There is no mystery that the SEO they (and I) are applying is beyond anything else, otherwise EVERYONE else (like you claim, as I am copying existing SEO) would then rank #1.

Interesting question @Yonah Weiss - were you up pondering the mysteries of life?

What's the answer to the mystery 70k profit?