The whole point of the estate plan is asset protection - avoid probate, have clarity on who will get what, and have an executor (some relative, could be your sibling or spouse) who can make decisions for you if you go in coma.Impressive set of assets though.

Have some names of the dad's siblings. 

Some times parents or siblings will help. 

My siblings and I have been willed a property that we have agreed I will buy from them at a pretty deep discount, and I was planning to buy it from them with cash. 

A good friend plus 3 siblings inherited a 4,000 sq/ft house on 7+ acres from deceased parents over 20 years ago.

Two little kids who are siblings might share one in a pinch, but 2 teens or 2 adults do not want to sleep in a bed that small.  

My brother and I are purchasing a home (cash .. brrr method) and planning on doing a cash-refi (conventional loan) after a 12 month seasoning period.  We plan on purchasing the home in our personal names - mostly beca...

This can be via an friend, sibling, aunt/uncle, etc.

My wife’s family is giving my wife and her two siblings 47 acres.

If you don't have the cash in hand, do you have access to people who would partner with you or that you can turn into private lenders (i.e. parents, older siblings, cousins, aunts, uncles, coaches, pastors, mentors, etc.).