Consider bringing a toddler bed or small mattress into your room for your child to sleep on so that you can continue sharing a room and everyone can get much needed sleep. (romper.com)
Mezzanine with small mattress for a child. (paradizo.com)
This mattress can save cost and provide the extra utility that most round mattresses or smaller mattresses can not deliver. (bestcribmattressreviews.com)