Newby from Texas looking for advice.

Thanks for the add. I'm new to smokers and I'm getting ready to build my first one, an electric smoker. I live in Texas and love to hunt. I'm going to be making and smoking sausage and summer sausage and probably some other meats maybe turkey or hams. I'm
Wanting some advice. The picture is a trailer that I'm wanting to use as my smoker. I'm thinking of tipping it upright, removing the doors and welding that end closed "which would then be the top" and cutting and welding doors Where the actual floor of the trailer is now. So the smoker would be tall and the curved part would be at the back of the smoker. The demonsions are 5' tall X 38" wide and 40" tall. My question is what watt burner will I need to get the box hot enough? Thanks in advance.