I'm a licensed general contractor in Los Angeles, California. I built a 7,000 sf luxury home on a property owned by my in-laws and split the construction cost with them. It cost us half the going rate for this type of construction because I not only worked as a general contractor, but as designer/architect, sub-contractor (for most of the work) and laborer (for a great deal of the work). The agreement was that we would rent out the home and I would collect all the rent though they would retain legal ownership of the property. My wife and I and my in-laws all signed the document, though it was not notarized. What legal rights does this give me if they decide to sell the house or if my wife and I get divorced?