I am trying to better understand making offers and its relation the BRRRR strategy.For example, if a property is listed for $150,000 with an ARV of $180,000, and will require $20,000 in rehab, according to BRRRR I could pay no more $106,000. 

Expensive" is a relative term. 

Many members are experts in their respective fields related to real estate investing, whether that is real estate brokerage, wholesaling, flipping, buy and hold, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.There are some pretty cool discounts on various products and services offered as Perks to BP members that you might want to check out: https://www.biggerpockets.com/perks/pro

I would suggest skiptracing the owners and or any possible relatives.

Not really real estate related but you never know.

It was a relatively new, basic, builder grade 3/2 home with 2100 sq.

Relatively new, basic, builder grade 3/2 home with 2100 sq.

Is this related to your thread a few months back re: a deceased seller and unknown heirs except the sister?

I wasn’t thinking something relatively central.  

You have to find that tenant who can afford to buy a relatively nice house that still wants to rent.I generally have to stalk Craigslist whenever I post for that reason.