It's easy to calculate cost; it's hard to calculate value. Once our Overlander was restored (which took longer and cost more than I'd like to admit), it's just a matter of routine stuff. We have some occasional repairs. There are "consumables" like batteries. One of the things I did was to invest in higher end mechanicals (like a marine stove, marine wiring, etc.) so the long-term costs would be lower. We have Progressive and an "agreed upon" value policy. The simple fact is that we won't be able to sell the Overlander for what we have into it, but if we're able to camp for another 20 years, I think we'll be OK.