I would like to buy a closed enclosure but can't afford pvc I am going to buy a wood enclosure is there a wood that's peered. What's the best way plastic lining or is there a waterproofer that's safe for pets in high heat and humidity? I am in southern California if anyone has one or two please let me know. I am looking for at least 4 feet but would like longer 8 ft would be best so I can put together and just out a board in the middle