What's fair compensation for my work sourcing the property, designing and selecting the improvements, working up the pro forma and budget, and managing the work to completion?

Keep in mind the approval will only last a couple months, and the lender won't "lock in" the rate unless you have a signed purchase agreement.

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For example, if you made $200,000 from a sale of a home you can select a product in the identified market and then create an LLC (required) and then specifically identify that property as your OFZ property and ''park' your money there. 

Having a shared wall is much better than having a shared ceiling/floor.As to the building's age, 100 years old is not immediately a bad sign because people update properties as they hold onto them throughout the years.

I've heard owners that simply tell the residents they don't rent homes and therefore the residents have to either sign the new RTO or the lease will not be renewed. 

Only offers made in writing and signed and accepted by both sellers and buyers are legal. 

After the auction is finished, I go into their office to sign paperwork and a week or two later, I have my hard money loan on the property.

Happy to sign a Non disclosure since you don’t know me.   

I have not signed anything but do have their receipt in my email inbox.