Pros
You learn a lot about the building industry working at 84. This is all on your of course, but when my employment ended, I was much more educated on contracting and building industries.
Cons
The cons far outweigh the pros at 84, in my particular situation. You are required to work 48+ hours a week, including weekends and holidays. You work with the same few people at all times, which means if you get stuck with a poor management team, it's extremely frustrating. Nothing is taught to you, you are expected to learn on your own as you go. This can be a good job for some- if you have just a high school education, no specific training, and no network to get you into a more lucrative career, then this is a decent option. I'm not trying to be derogatory, that's simply my opinion of the opportunity. There is theoretically advancement potential, although like at most corporations, it depends on variables. If you learn and perform, you can move up, although ex police and military are almost always promoted quicker. Seniority has no effect on your promotion.