Hi! Hoping you can point me to building plans for a heated outdoor Sulcata house. Tortuga goes into his plastic doghouse on his own in the evening, but I want to replace it with an electrified wooden house with a heat source. (Last winter I used a reptile mat and covered him with a hot pad and rug every night; previous winters were spent in the house but now he's too big.) Our Southern Oregon winters can be 30 to 60 degrees for four to five months. He's ~50 pounds and eight years old. He free-ranges in a 0.2-acre backyard that is well fenced. Thanks in advance.