I think your DD is a year or 1.5 younger than DS2, and I'm mad on your behalf! 4 months is nothing in a child's frame of reference as far toys go in their house. DH keeps trying to suggest we get rid of ds2 huge workshop but I won't, despite him not playing much with it 60%. Thing is, we had a horrible Saturday until yesterday with CONSTANT rain all.day daily and he played so so much with that toy.
Also huge draw for his little friends when they come over for playdates. I told DH a year-2 years is most I try to keep big expensive toys around, and we HAVE the space to keep it so I didn't see any validity in his argument. Can't you see for something like that as used toy with FB buy/sell groups???