I am so sorry for all that has happened to you. Rest assured though that your childrenare young enough that if you handle this as well as you can they will not be destroyed by all of this. Things like a summer vacation are not the end of the world to little kids, they can be happy going to the town pool and out for ice cream if you present it the right way. Just take a deep breath and try not to melt down in front of them and tell them you are losing your house, the world is ending, etc. I know it feels like it is!
I say this because I have been through some challenges too and I know that if I try to make having to leave my home suddenly due to my AH being out of control "a surprise trip to Gramma's!" it goes over a lot better. I don't think this is being dishonest to them when a kid is young, it is protecting them. Best wishes to you.