Hi, I'm new to this so forgive my ignorance. I'm planning on building a dividing wall with a see though cage for a Ball python .The wall is to be 5'long 1' wide and 8'tall. The cage will be 4'x 20"?).Should I lean towards a sider door ? On one side or both ? Should I make the opening a few inches up from the bottom of the cage for the substait ? Should I use glass or plexy or ??How do I heat,light and vent? THANKS murph