I would recommend a pack n play as well, but would suggest you buy a separate mattress to go in it. The ones that come with the pack n play are just thick cardboard with a thin pad on top. We got this one:
https://www.amazon.com/Dream-Me-Playard-Mattress-White/dp/B004JU0H6O/ref=sr_1_5_s_it?s=baby-products&ie=UTF8&qid=1527904273&sr=1-5&keywords=pack+n+play+mattress