There's three siblings, and there was some disagreement and grumbling over who gets what, and what percentage.

Thanks Shiloh, I really think it’s a family dynamic among siblings that could be holding everything up.

The siblings and her have done the following-Checked with original manufacturer of home for paperwork - Searched the home in all the places these placards could be- Contacted county register of deeds for records- Checked with local Town authorities for records- Checked with state DMVNone of these have produced a document of when it wad built or put on the property.

I own one unit in the building and my sibling owns the other.

My sister is the executor and the rest of the siblings are all named as beneficiaries.

My father worked hard all his life to give me and my siblings everything we have ever wanted and needed but at the cost of constant joint pain and other related issues.

That might be a way around the 'lender' and setting up an equity share agreement with your parents may help you avoid any estate misunderstanding problems with siblings down the road. 

My Dad was encouraging of a different life path but he lived in large part in sacrifice of loftier dreams to create a nest egg that would hopefully make things easier for me and my siblings.

To answer your question the bigger unit is occupied with siblings & parents.

Our intention (my siblings and I) intend to sell it as is.