Total cost: Under $50
Time: about a hour
Note: This post is a work in progress. If you have any questions, Let me know in the comments below ;c )
Notes:
Make sure to attach your eye screws to studs.
Improvements:
This is a working prototype. The softness of the wood the baby gate is made out of has me a little worried. In the future I might add small bolts all the way through the gate.
I’m also going to cut off the lock bar on the back of the 2nd gate. If you leave yours, It make it more adjustable.