As a certified welder of 20 plus years myself, I've said before you can't take a handfull of illegals, give them a hood and gun and expect any kind of quality welds. Welding alm is hard, really hard to get it right. Those tacks will not hold up under the flexing and vibration of going down the road. I'll stick with a wood frame. Wood is more durable and easy to fix. Anyone with an alm shell camper, trailer, fifth wheel, should be concerned. I would bet the skin and filon is the only thing holding a lot of those rigs together.