My wife and I approached her Grandmother about buying her house. My mother-in-law, who was caring for her, moved out about three months ago when she became engaged and rarely visits. My wife now does the most to care for her Grandmother. We have learned my mother-in-law would like to put her still competent mother into a nursing home because caring for her is getting to be too much. Grandma does not want to go. The problem is I estimate the house would sell for around 120,00 to 140,000 but we could probably only afford 75,000. Grandma would not have to pay for anything other than medications once we were in. What can we do before hand to prevent my mother-in-law from taking action against us saying we coerced Grandma into selling us the property for less than fair market value even though all other family members would have no problem against it? My mother-in-law is the only surviving child.