You will have ownership and your name is on the deed…so that part is good.  

Want to transition from SF to MF with creative financing, the most challenging part is to find the off market deal for me

Now, this next part is technical but important: When you work with a QI, you also want to make sure that the personal residence portion is specifically excluded out of your Exchange Agreement and the Assignment of Contract to the QI, and there should be separate settlement statements for each side of the transaction.

I believe only interested parties that were properly notified of the sale would have their interest extinguished. 

The tenant can rent them from a 3rd party company easily

Siblings are not prohibited parties. 

Be open, honest, and get it all agreed to, understood and approved in writing and signed by all parties. 

If you can cash flow, and are able to find third party management, it may be a deal.

In that sense, when an investor buyer is competing with other investor buyers for an off-market property, you are not typically given the opportunity to perform a full third-party inspection prior to putting in your highest and fastest cash offer.I'm not a pro by any means with off-market properties.

Now the two parties are fighting over the famous name....perhaps name of the ranch was not included in the sale.