It sounds like you are trying to FIX something for these individuals in your dreams. This is something you had done a lot in your life, "fixing" to make it better for others.

You are probably ruminating a lot about the loss you suffered and how you could not stop it from happening.

It's important to keep in mind that this is something "normal" to how we are set up because when we suffer a loss that is sudden and traumatic, we are designed to WANT to find ways to prevent, it's because of this that we have learned a great deal in how we can prevent and gain more knowledge so we can survive through a lot of challenges.

The human brain and even the body does a lot of "healing" and repairing while we sleep. It's restoring and healing and trying to refresh and problem solve. Actually, one of the reasons we came up with this idea that ghosts etc. only haunt at night and often around 3 in the morning is that is the common time most go into rem sleep and can experience these nightmares where often what they dream can feel so "real" and vivid and one can even wake up frightened by their own dreams.

Our brains take in a lot more information during the day than we realize. While we sleep our brains sort and in that sorting often discards things that are not important enough to store.

So, what these dreams were reflecting is your own effort to try to come up with how you can come to some kind of resolve about your ongoing challenge. So, somehow your mind was experimenting in a way with finding homes for these deceased individuals.