Having a home sitting on more than one parcel of land is very risky. My guess is that a CA real estate lawyer is going to tell you that you cannot enforce the removal of the home or collect ground rent. What you have bought is a cloud on the title to that home. The homeowner is never going to be able to sell or mortgage his home as long as you hold title to a small piece of it, so sooner or later he will have to negotiate with you to re-purchase it . That is, unless he has some legal defense to the tax sale. You are probably going to spend a considerable amount of time in court defending your purchase.
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