My aging parents can no longer take care of their home and we are buying a larger house to accommodate them moving in with us. We could financially handle the whole cost but they have agreed to pay 25% of the purchase price. The 25% equals $280K. We will be providing 40% and financing the remaining 35%. This is too large for a gift deduction. It is a payment for the additional cost associated with them moving into our house so can we just write out an agreement that this $280K is to cover the additional expense that is incurred by their requirements? They will not be on the deed.