DIY Co-sleeper made from a $69.99 IKEA crib! I actually really like this one and it would last a LOT longer than those teeny tiny ones they make for newborns. Plus it gives the child "their own bed" feel if you're having a rough night.
DIY Co-sleeper: Buya regular assembly-required crib and leave one side off. The crib is securely attached to the bed frame with nylon straps. Might be good- but by the time the baby is ready for a crib, I want them in their own room
Make a Sidecar Cosleeper in 2 Hours With Standard Lumber.