I am building a (small) reptile room and I need to maximize my use of space, to say the least. To be honest, I'm not really interested in purchasing from any of the current cage manufacturers. Non-existent customer service, months long lead time, cheap wobbly racks, not customizable, crazy high freight costs, etc.

I am thinking about building my own caging, but want nothing to do with wood cages anymore. I've long wanted to try building with T-slot, but am not sure where to start. There used to be a company called Sentec that made T-slot cages, but they are long gone.

1. Any suggestion on brands or T-slot sources? There are lots of different brands ranging from somewhat affordable to ungodly expensive.
2. What kind of material should I use for panels? I'm assuming 1/2" expanded PVC?
3. Any tips or tricks to working with the material? I'm wondering why no currently manufacturers use T-slot anymore.