thanks for sharing how this works for your family!
i do a floor bed with my almost-2 year old as well. we took the door off of her bed room when we were setting it up and replaced it with a baby safety gate that opens out. there are so many ways to make the space work for you and the no door thing made me more comfortable and made it so we had no need for a baby monitor or anything like that which would need to be plugged in & need a table. we started right away with a regular twin size mattress. memory foam kind to avoid bouncing. 