Also as you said, there are usually simple work around to avoid abatement.

To keep it all simple and clean I just want to pay him a set interest amount on the money he puts in the deal.  

Using a simple percentage of rent won't work, because in our minds, Capex does not scale linearly.

Purchase price: $67,500 Sale price: $69,000 Simple wholesale deal.

You can then involve a title company to ensure it is your property after the transaction.That being said, I am a simple guy and haven't ever tried anything like this. 

I'm reading tons of threads and articles on Fix n Flips...I'm still not understanding the numbers.Look, I like to keep things as simple as possible...I feel like, we as humans have a huge problem making things more complex than they need to be.Let me give you a mock up example that I pulled from a fix n flip thread right here on BP...these are the end results:" Sale Price=$265,000Rehab Costs=$44,000Closing Costs=$15,000Holding Costs=$5,500Purchase Price=$156,000Net Profit=$44,500  "This is one of many cases  I'm seeing around - I don't understand....if...u put in 66k...but profit 44.5k - it sounds to me like you just lost about 15k after all your hard work and efforts to flip the house. 

Fairly simple.  

Simple things that need a little TLC that you can tell have been neglected. 

So title company suggested that maybe a real estate attorney could do some simple paperwork for the the deed showing the SDIRA is "selling" 20% and the new deed would read "xyz-LLC" 80% owner and "XYZ" (private person) 20% owner.Any ideas/previous experience/guidance/suggestions? 

Tonight I went to a home to sign the REPC with a guy I’m buying a home from.I engaged with him a few weeks back and he was relieved to meet me because I can make thing so simple for him by buying w cash.i followed J Scott’s advice and asked the seller how much he thought the property was worth.