No nursery for baby?

My husband and I live in a 5 bedroom house and we sleep in the master bedroom. The 3 other rooms are rented out and we have an open small bedroom that just opened today October 1st since the roommate left last night. My MIL said to find another roomnate for that room since we are struggling a bit and the rent is extremely high. But I think this room is perfect for a child. However we plan to have his nursery in our bedroom with his crib and decorations. What can we do with the extra small bedroom we have? My husband says lets not rent it to anyone even if we pay more money, make it a storage room where we have toiletries, diapers, and baby's stuff stocked up, and also a little office to keep my laptop and important papers there since I work from home sometimes. Any tips or ideas? I don't want this empty bedroom to go waste.