Honestly?
I think deciding this before you're a mother is naive at best. You have absolutely no idea how you're going to feel physically or emotionally.
You've no idea how baby is going to be either. Some babies will be fine with this others won't cope well at all.
Google "fourth trimester" too
Is dh going to be looking after baby at home with you also working at home?
How big is your house? Because I can see it being very distracting baby crying or even just nearby while you're trying to work. It's NOT the same as being able to ignore another persons baby crying, there's an emotional attachment that is (or should be) very strong.
Are you planning on the baby going into formal childcare after your husbands paternity leave ends? How old would baby be at this point? Lots of formal childcare places aren't set up for/won't take very young babies.
Especially if the set up is one where other children are also being cared for, because very young babies need pretty much 24/7 care and it's virtually impossible to care for other children adequately in a professional setting if caring for a very young baby.
I speak as someone with a lot of experience in childcare including as a nanny and childminder.
A nanny is one option but I would advise you use one that you KNOW has experience of very young babies and that tends to be older nannies, because in recent years it's become much less common for mothers to return to work while the babies are still very young.
Older + more experienced = more expensive too.
Even in group care arrangements fees for younger babies tend to be higher too BECAUSE there's more input required and it can mean they're unable to take on additional older children and the loss of those fees needs to be balanced.
And again I personally would recommend a provider with proven experience (not all childcare providers are equal, even with regulation there's a huge difference in quality)
Have you considered all of this? Have you checked into possible providers and fees?
Even purely from a financial perspective I can easily see you being lucky to break even.