What smoker should I build? Pics of Cabinet

[Bigern26]

I just picked up this cabinet to build a smoker.
Its all aluminum and I plan on welding sheets to the sides to insulate it.
Want to build a smoker to use for primarily smoking wild game sausages, venison bacon, pork butts, and other meats/fish.
In your opinion, what type of smoker should I build?

I do have a old pellet grill that I was going to take the burn box and put it in this figuring that would be my easiest route for controlling heat and adding smoke. But not sure. I have tried to build electric in the past and it would not heat up.
Propane is an option. I do not want wood fired.

 

[BigW.]

I can't find the thread but recently a new member made a similar cabinet with a pellet burn pot. Added wood to the outside of the steel and looked really sharp. Maybe dig around the smoker build forum and you can find it.