The welder is too small for me as well, but I got the biggest and best I could afford at this point.
In my opinion, between the TB 302 and Big 40, there isn't a welder worth the price increase. I have a Big 40 with the Cat diesel on my truck at work and love it. If I could've swung the 11k for a Big 40, I'd have one for my own use.....maybe down the road.
As far as tanks go, after 2 hernia operations and other unpleasant "issues" in the past 4 years, I'll stick with the smaller tanks. My trailer sits way off the ground, and I'm not gonna lift a 300+ cubic foot tank that high by myself. Ten years ago, yes. After what I've been through lately, no way.
The decals were required by the head of safety where I work, and work side jobs indepentantly. I have no say really. Besides, in a world that sues at the drop of a hat, it makes sense to protect yourself to the best of your ability within reason. I also have a yellow warning beacon I must display and use when in areas on base that are populated with personnel. I also am forced to deal with portable weld screens, which is a huge PITA. But the money is great, so I really can't complain.
Welding rigs are highly personal and set up really for the owners needs and preferances. What works for one, likely won't work for another.