So at this point I'm actually just entertaining myself by still looking for bed options for the kids room. But for now I can't stop (won't stop). I initially breezed past this trundle bed because I didn't like that it was white melamine and the screws were visible on the exterior. But I revisited it when I realized it could be styled as more of a daybed. Piling pillows around the perimeter would make the bed cozier and distract from the basic nature of it. It's the Ikea Flaxa Bed with Trundle option.
I haven't felt the trundle mechanism yet to see how easy it is to maneuver. But with most trundle beds coming in at about $1000 I thought this was an affordable solution. I'm adding it to the list but it's not at the top. As I dive deeper into the options for sharing our tiny room with our specific kid's ages, I want to share my findings in case they are just what you are looking for.
I stumbled across another trundle bed made in Brooklyn by CasaKids. I love the clean lines and natural wood.
A few more beds I love, that don't work for our tiny shared kids room, are below in case you are looking: