husbands unrealistic dreams

does anyone else have a husband who dreams of buying ridiculous items?? my husband dreams of building a "safe room" in our house. as in a giant gun safe build into our house, buying lots of guns and weapons (we live in the Midwest. this is pretty common) and purchasing military vehicles just yo have as his everyday driver. I'm hoping a lot of these things are just talk and dreams that may not ever come true but he constantly asks me if I approve and if he can start planning for these things. I don't want to be a jerk but part of me jyst wants to tell him to grow up! we have a baby on the way and buying a giant semi like military truck isn't practical with an infant. it's probably hormones but it's annoying!