@James *********
I have considered the issue of guaranteed renewal previously. My conclusion is that it has little value since they can price you out of a potential renewal at a certain age. In other words, if in the future an annual renewal cost me $10,000 or $20,000 or $30,000, eventually my guaranteed-renewal is useless. I might be able to lower that cost by significantly by increasing my deductible, but that gets me closer to self-insurance - but true self-insurance is not acceptable for visa purposes. Or I switch to annual extensions based on retirement, until they also have an insurance requirement.