Renting to a family with a newborn?

Right now, my boyfriend and I have a really good setup, for housing during college. When my boyfriend's sister went off to college, their father bought a house and they filled the extra rooms with room mates. Now we're moving in and because it's my boyfriend's father, we get very inexpensive housing. With us and his sister and her boyfriend, two out of the four rooms are taken and pid for, but that means there are still two rooms that we need to rent out. ANother thing is that there was a house fire in May, and it is still under renovations, and not many people will wait for a house that si not finished yet.

One of our offers is from a couple with a newborn. They're friends with my boyfriend's sister, and they have savings and steady jobs so they will be able to pay rent for two rooms, plus any incidentals. They have even offered to pay more than the offered rate. They have their own home, so it's not a big deal if we decide against them moving in, but I'm stuck.

It would be great to have both rooms rented out to responsible people, we are a generally quiet household, and the past room mates have caused lots of problems by throwing parties and bringing drugs in to the house, which we do not like. This couple is also willing to wait until the house is renovated to move in, something that a lot of potential room mates are not willing to do.

But I am worried about the effects of having a newborn around will be. On one hand, I think it will be a good lesson for us, and we can actually see the real facts of raising children and get some experience for down the road. On the other hand, I know babies will cry a lot, and I'm not sure how it would work in a household. I'll be going to college, and I can just picture the night before a big exam, the baby being awake and crying the whole night.

Am I overreacting? Is it worth renting these rooms out to a new family?