I'd be going to school and get certified to be an inspector.Hey at 41 and that much pain,which I doubt the heavy lifting is helping,I'd go for something easier on the body.All that heavy work is only going to make it worse.
I'd also get another opinion,I worked with a guy that had real bad pain starting when he was 20,seemed he was born without the cushy stuff between the vertebra from very bottom to half way up spine.For 10 years he said no to surgery,pain got so bad that in 1988 he had it done where they put bars on each side and used that to spread the spine,or to take pressure off of the vertebra.He said it cut pain by 95%,and is still the same today 19 years later.Said he should have had it done sooner.
Get a good speciialist to check it out,never know might be something to be done.Best of luck to ya Dale.