I have a disease called Dupuytren's contracture that bends one's fingers towards the palm. I have had two surgeries, but it keeps coming back. My luck it is on my ring finger of my left hand.
About ten years ago I got a Celtic cross tattooed on the finger as a wedding ring. My wife is like you, a construction worker and can't wear a ring. we got a simple silver ring for her when we got married in Las Vegas, and I wear that on my right ring finger.
When my son got married they exchanged silicone rings. He gave me the extra one, and I wear that over the tattoo.