I think mine was made around the spring-summer of 2011, (it was a model year 2011 model, so that is why I got a decent deal on it.) Will have 160 days in it come April. For the price, as I didn't expect a Cadillac at Yugo prices, I think I've come out ahead, about $100/night, which is cheaper than even the least expensive roach motel in central Texas... and no worries about bedbugs.
I wouldn't blame the workers. I would blame the system. There are ways to make high quality goods, such as inspections during each state of the process, starting with decent materials (for example, Uponor ProPex or Flair-It Pro are the best you can get), proper procedure (each rig's wiring and plumbing is documented), etc. It is just easy for poor quality RV makers to skip basic QC and put out junk, or even start with worthless materials (fiberglass on luan for example) knowing that it will fail eventually.
You do get what you pay for though.