Eventually... Hubby will have to admit to needing to buy more kid stuff... as the baby grows and outgrows what you presently have.
A pack n' play... is not a crib. And as the other poster said, as the baby gets bigger and heavier, it is a REAL hardship on the back and arms/wrist to lift a child out of there. But I know some people do continue to use it as a place for the baby to sleep. And then if/when you do buy a crib... then baby will either like it or not... as each baby needs to adjust to "new" things too. THEN, when the baby grows up... then you will need to buy a "toddler bed" too... then as the child grows up more.... a regular bed or twin bed etc. So... it is never-ending.
That is just life with a baby and child as they grow up.
You WILL need to get a stroller... for the baby. If not now, then eventually. Sooner than you think.
A baby by nature, WILL outgrow their clothing and gear & diapers etc.... thus, the need to buy more age appropriate things... and by nature of having a child, there WILL be lots of things, unnecessary or not, that will end up around the house. Thus, periodically you will have to purge things as the child grows up. Even toys, the baby WILL outgrow it.
So, Hubby will have to come to terms with that.
Its hard to have a home with children... to be "not" full of extra "stuff." Having a child does fill the home... with things, necessities and other things.