If you're looking for a hamster forum, hamsterhideout will probably be one of the best ones out theres. However, I have a syrian hamster and her cage is made out of an old guinea pig cage.
I really like it and it's a solid cage, but it isn't the most visually appealing. It also isn't too fun to make. For me, the main benefit of having a cage like this over a tank or bin, is the ventilation it offers.
I wouldn't use chicken wire. You want to find wire mesh (usually in the garden section of a hardware store). It should be at the largest half inch spacing, you can also do it with quarter inch wire.
The wire can be very sharp and isn't easy to work with. You need something very strong to cut it with and tons of little zip ties. Mine is zip tied every few inches. You want the wire tight to the cage everywhere so a hamster can't squeeze out.
Sharp edges can be covered with duct tape if your hamster isn't a chewer. The entire door of my cage is taped on the front and back so she can't climb it because there's a little space where you open the door and I obviously didn't want her escaping. There's also tape around the door to cover any sharp edges.
Here's a picture of my girls cage. It is a smidge under 540 square inches.
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