The tax benefits don't necessarily have to tie to the pro rata ownership percentages. 

@Crystal Smith - yes your points are all spot on - i struggle with accurately gauging whether i think i will for sure cashflow more in a re-sell scenario vs. the cashflow on a re-fi vs. breaking even on either scenario.as far as house hacking, i listened to the BP podcast w/ Brandon Hall and visited the 1031 forum here and as far as I can tell, i can house hack and my tax consequence is pro rata in relation to the portion i occupy. 

Any non qualifying use since 2009 applies pro rata to the exclusion.

then the 401K could take a pro-rata portion of the profit? 

You will also have expenses to write off against it, such as a pro-rata share of property taxes, insurance and mortgage interest.  

For our first deal, we could pool our money and purchase a property and share the returns pro rata based on our contributions.

The $55 comes from the $358.32 principal portion of the borrower's payment, which is the pro rata portion of the purchase discount.

The profit from sell gets distributed to all the investors and sponsors according to their pro-rata share of ownership.

Agreeing with earlier posts on this that our PoL investments are with individual properties and each holder is assigned a pro rata share of the loan based on the amount invested.  

However a single member LLC may not protect the owner from creditors.For tax purposes an LLC can file as an S Corp (file S election w/IRS first)No upper limits on the number of LLC members, S Corps up to 100No restrictions on LLC ownership interests (flexible), an S Corp can have only 1 class of stock but can have differences in voting rightsSpecial allocations in income, gain, or loss in an LLC is permitted but not in an S Corp they allow pro rata allocations because of the stockIn regards to distribution and contribution of property (not cash) an LLC may have tax advantages over the S Corp.