Just a caveat, I had a terrible relationship with my late mother, so this may be contributing to my hesitation in this...
DH's parents, who I love dearly, just sold their house and are in the process of moving into a flat. They have given us quite a lot of furniture that they did not want to move with - and the things we are replacing with their gifts are going into storage for our DCs when they move out on their own. I am having a tough time accepting these gifts, but understand the spirit in which they were given.
DH just told me that his DF has just offered us a very large (to us) amount of money as essentially an advance on inheritance, partially for us to avoid inheritance tax when the time comes. It would allow us to put down 35-40% on a house in the area we hope to settle permanently. DF says that their flat is only meant to be temporary - he figures in 5 years they will be in a care home or dead anyways (DFiL is 85, DMiL is 84).
While this gift would mean a lot to us, I am hesitant to accept it. I want them to have the money they need for good - there have been family members who have lived to nearly 100. As a likely throwback to my relationship with my of blood relatives, I am also hesitant because I don't want to be beholden to them. We have a fantastic relationship, and I don't want money to foul it.
Frankly, we would not be in a position to purchase a house for ourselves for the better part of a year or two, anyhow. I have a year left on my engineering degree, and it would be silly to move before I had established stable employment afterwards.
Please help me, oh hive mind of vipers - have I lost the plot?