I built my own vertical propane smoker for hanging sausages/snack sticks. Also have racks for ribs and pretty much anything. Used a huge stainless mixing bowl at the bottom as a water pan.
IDK if they sell them anymore but academy used to have a pretty decent smoker line with 1/4" steel construction. For the price they were really good. Made in Mexico but the welds were acceptable and you're buying steel.
If you want something you can truly be proud of, check out this guy named Allen who posts his smoker builds on youtube. Allen's welding and woodworking. He does amazing work at really conservative prices. I would recommend 1/4" steel.