Alternatively, your sibling might use a 1031 exchange to defer taxes by reinvesting in like-kind properties, though this doesn't directly fund a primary residence.Other ideas include leveraging a HELOC on the rental properties for the down payment, taking out a 401(k) loan, structuring an owner-financed agreement, or a lease-to-own arrangement.

Any luck on motivating realtors in the area to actually get operating expenses/lease agreements for Jackson County specifically George?

You might be able to get around the fact your entity owns the property by either transferring the property back into your personal name or by some personal guarantee or cross-collaterization agreement.

Review their management agreement.

One thing I always remind people is it does not matter what is on a powerpoint presentation, the deal is dictated by whats in the PPM, operating agreement and subscription agreement. 

@Allison Littman To structure the purchase creatively, you could split the $600k transaction into a $400k purchase agreement and a $200k charitable donation to the seller’s tax-exempt organization.

Quote from @Bob Dole: Quote from @Aaron Zimmerman: Quote from @Bob Dole: @Daniel Kazakos I think we're all in agreement on cost segregation.  

Spruce the place up and find a new, qualified renter at market rate.Don't forget to update your lease agreement.

And even though virtually every sponsor agreement allows me to share investment information with others who might be advising me on it (especially when club members are bound by an NDA), I still ask the sponsor if I can share it, because it's a test.

If they won't let you build on it, explore doing a lot tie agreement so that you can combine the parcels and when you go to resell it, you can ask for a higher price point based on the large lot.